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    Publisher: Academic Journals Inc., USA
   
  Research Journal of Physics is an international peer-reviewed journal committed to publish and disseminate original research in the field of physics (pure and applied) through a fair and rigorous review process. Scope of the journal includes: Atomic and molecular physics, condensed matter, elementary particles and nuclear physics, gases, fluid dynamics and plasmas, electromagnetism and optics, mathematical physics, interdisciplinary, classical and applied physics.

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  Editor-in-Chief:  Fabian I. Ezema
 
 
Aliouane, N., T. Badeche, Y. Gagou, E. Nigrelli and P. Saint-Gregoire, 2000. Synthesis and phase transitions of iron phosphate. Ferroelectrics, 241: 255-262.
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Almairac, R., H. Aarab and P. Saint-Gregoire, 1992. Kinetics of the Incommensurate to Commensurate transition in the solid solution (NH4)1-x (BeF4) x (SO4). Phase Transitions, 37: 165-177.
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Almairac, R., M. Siali, S. Vilminot, P. Saint-Gregoire, G. Delplanque and G. Barre, 1985. Phase incommensurable dans le compose mixte (NH4) 2(BeF4)0,82(SO4)0,18. J. Phys. Lett., 46: L1123-L1131.
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Astito, A., R. Almairac, J. Lapasset, P. Saint-Gregoire and J. Moret, 1993. Phase transitions and domain structure in a doubly unstable compound. Ferroelectrics, 141: 19-24.
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Astito, A., R. Almairac, J. Moret, P. Saint-Gregoire and J. Lapasset, 1994. Coupled instabilities in the solid solution [P(CH3)4]2(CuCI4)1-x(CuBr4)x. Ferroelectrics, 155: 287-291.
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Augereau, F., G. Despaux and P. Saint-Gregoire, 2003. Imaging ferroic domains structures with an acoustic microscope: Example of PPLN. Ferroelectrics, 290: 29-38.
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Bachheimer, J.P., B. Berge, G. Dolino, P. Saint-Gregoire and C.M.E. Zeyen, 1984. Calorimetric and neutron scattering studies of the incommensurate phase of berlinite AlPO4. Solid State Commun., 51: 55-58.
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Badeche, T., Y. Gagou, C. Roucau, M.A. Fremy, D. Mezzane and P. Saint-Gregoire, 2003. HREM Study of the room temperature phase of PbK2LiNb5O15. Ferroelectrics, 290: 83-90.
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Badeche, T., Y. Gagou, N. Aliouane, O.A. Aktsipetrov, M.H. Pischedda and P. Saint-Gregoire, 2001. Structural characterization of PZT thin films and related properties. Ferroelectrics, 254: 403-410.
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Barthes-Regis, M., R. Almairac, P. Saint-Gregoire, C. Filippini, U. Steigenberger J. Nouet and J.Y. Gesland, 1983. Temperature dependence of the wave vector of the incommensurate modulation in two BaMnF4 crystals grown by different techniques, neutron and X-ray measurements. J. Phys. Lett., 44: L829-L835.
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Belboukhari, A., D. Mezzane, Y. Gagou, M. Elmarssi, I. Lukyanchuk, A. Zegzouti and P. Saint-Gregoire, 2010. Dielectric properties of new ferroelectric lead potassium niobate Pb0.9K0.2Nb2O6. M. J. Cond. Matter, 12: 103-107.
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Bianchi, U., W. Kleemann and P. Saint-Gregoire, 1991. Linear birefringence studies of incommensurate systems: II. KfeF4. Phase Transitions, 36: 155-164.
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Choukri, E., Y. Gagou, A. Belboukhari, G. Erramo and M.A. Fremy et al., 2011. Phase diagram and dielectric properties of ferroelectrics ceramics Pb2-xK1+xLixNb5O15. Superlattices Microstruct., 49: 300-306.
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Choukri, E., Y. Gagou, D. Mezzane, M. Elmarssi and Z. Abkhar et al., 2010. Phase diagram of TTB ferroelectric compounds Pb1-xK2xNb2O6. J. Cond. Matter, 12: 81-85.
Choukri, E., Y. Gagou, D. Mezzane, Z. Abkhar and R. El Moznine et al., 2011. Dielectric and structural properties of diffuse ferroelectric phase transition in Pb1.85K1.15Li0.15Nb5O15 ceramic. Eur. Phys. J. Applied Phys., 53: 20901-20901.
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Choukri, E., Z. Abkhar, Y. Gagou, M.A. Fremy and J.L. Dellis et al., 2010. Dielectric properties of lead potassium lithium niobate (Pb1.85K1.15Li0.15Nb5O15) with Tetragonal Tungsten Bronze (TTB) type structure. J. Cond. Matter, 12: 86-91.
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Eijt, S.W., R. Currat, J.E. Lorenzo, S. Katano, P. Saint-Gregoire, B. Hennion and Y. Vysochanskii, 1997. Soft mode behaviour of incommensurate Sn2P2Se6: An inelastic neutron scattering study. Ferroelectrics, 202: 121-129.
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Enjalbert, R., J. Galy, Y. Vysochanskii, A. Ouedraogo and P. Saint-Gregoire, 1999. Structural study of the ferroelectric instability in Sn2P2Se6. Eur. Phys. J. B Condensed Matter Complex Syst., 8: 169-177.
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Gagou, Y., A. Menny, J. Belhadi, M.A. Fremy and D. Mezzane et al., 2012. Pulsed laser deposition of TTB-type materials thin films example of Pb2KNb5O15 (PKN) and GdK2Nb5O15 (GKN). Res. J. Nanosci. Nanotechnol., 2: 24-30.
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Gagou, Y., C. Muller, M.A. Fremy, E. Elkaim and P. Saint-Gregoire, 2004. Structural study of ferroelectric and paraelectric phases of PbK2LiNb5O15. Phys. Stat. Sol. b, 241: 2629-2938.
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Gagou, Y., C. Muller, N. Aliouane, E. Elkaim, G. Nihoul and P. Saint-Gregoire, 2002. Structural and electrical properties of the new ferroelectric PbK2LiNb5O15. Ferroelectrics, 268: 417-422.
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Gagou, Y., D. Mezzane, N. Aliouane, J. Fabry and T. Badeche et al., 2001. Structural change and some associated anomalies in the ferroelectric PbK2LiNb5O15. Ferroelectrics, 251: 131-137.
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Gagou, Y., D. Mezzane, N. Aliouane, T. Badeche, M. Elaatmani, M.H. Pischedda and P. Saint-Gregoire, 2001. A new ferroelectric compound: PbK2LiNb5O15. Ferroelectrics, 254: 197-204.
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Gagou, Y., E. Padayodi, K.E. Atcholi and P. Saint-Gregoire, 2008. Study of the mechanical behaviour of clay, a natural material for house construction. Int. Sci. J. Alter. Energy Ecol., 6: 187-193.
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Gagou, Y., M.A. Fremy, T. Badeche, D. Mezzane, H. Choukri and P. Saint-Gregoire, 2008. Ionic conduction properties in PbK2LiNb5O15. Ferroelectrics, 371: 17-20.
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Gonzalez-Abreu, Y., A. Pelaiz-Barranco, J.D.S. Guerra and P. Saint-Gregoire, 2013. Piezoelectric behavior in Sr1-xBaxBi2Nb2O9 Aurivillius-type structure ferroelectric ceramics. Phys. Status Solidi B, 250: 1551-1555.
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Gonzalez-Abreu, Y., A. Pelaiz-Barranco, J.D.S. Guerra, Y. Gagou and P. Saint-Gregoire, 2014. From normal ferroelectric transition to relaxor behavior in aurivillius ferroelectric ceramics. J. Mater. Sci., 49: 7437-7444.
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Gonzalez-Abreu, Y., A. Pelaiz-Barranco, Y. Gagou, J. Belhadi and P. Saint-Gregoire, 2015. Vibrational analysis on two-layer aurivillius phase Sr1-xBaxBi2Nb2O9 using raman spectroscopy. Vib. Spectrosc., 77: 1-4.
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Jorio, A., M.S.S. Dantas, N.L. Speziali, M.A. Pimenta, C.B. Pinheiro, I. Lukyanchuk and P. Saint-Gregoire, 2004. Structural and dynamical aspects of structural phase transitions on incommensurate A2BX4 compounds. Ferroelectrics, 305: 75-78.
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Jorio, A., P. Saint-Gregoire and M. Pimenta, 2000. High-temperature phase transitions in incommensurate Rb2WO4. J. Phys.: Condens. Matter, 12: 9307-9315.
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Jorio, A., R. Currat, D.A.A. Myles, G.J. McIntyre, I.P. Aleksandrova, J.M. Kiat and P. Saint-Gregoire, 2000. Ferroelastic phase transition in Cs3Bi2I9: A neutron diffraction study. Phys. Rev. B, 61: 3857-3862.
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Kroupa, J., W. Schranz, A. Fuith, H. Warhanek and P. Saint-Gregoire, 1991. Optical study of the phase transitions in [N(CH3)4]2CoCl4 and [N(CD3)4]2ZnCl4. J. Phys. Condens. Matter, 3: 5975-5975.
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Kroupa, J., W. Schranz, A. Fuith, H. Warhanek and P. Saint-Gregoire, 1992. Study of the Linear Birefringence and Domain Structure in {N(CH3)4}2CoCl4 and {N(CD3)4}2ZnCl4. Ferroelectrics, 125: 165-170.
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Laghrib, S., M. Hamici, Y. Gagou, L.V. Roca and P. Saint-Gregoire, 2014. Synthesis of In2S3(1-x) O3x thin films by oxidation of In2S3 film and influence of film microstructure. Phys. Status Solidi A, 211: 2865-2870.
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Luk'yanchuk, I., A. Jorio and P. Saint-Gregoire, 2000. Thermodynamics of the incommensurate state in Rb2WO4: The Lifshitz point in A2BX4 compounds. Phys. Rev. B, 61: 3147-3150.
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Lukyanchuk, I. and P. Saint-Gregoire, 2002. Stress-induced change of the Lifshitz point type in A2BX4 compounds. J. Phys. Condens. Matter, 14: 7487-7491.
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Mahoui, A., J. Lapasset, D.G. Sannikov, J. Moret and P. Saint-Gregoire, 1996. On the ordering in [(C2H5)4 N] 2 Cu Cl4 crystal: An X-ray study and theoretical considerations. Z. Phys. B, 99: 543-549.
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Mahoui, A., J. Lapasset, J. Moret and P. Saint-Gregoire, 1996. Tetraethylammonium Tetramethylammonium Tetrachlorocuprate (II) [(C2H5)4N][(CH3)4N] [CuCl4]. Acta Cryst., C52: 2674-2676.
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Mahoui, A., J. Lapasset, J. Moret and P. Saint-Gregoire, 1996. Bis(tetraethylammonium) tetrachlorometallates [(C2H5)4N]2[MCl4], where M = Hg, Cd, Zn. Acta Crystallogr. Sect. C: Cryst. Struct. Commun., 52: 2671-2674.
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Mahoui, A., J. Lapasset, J. Moret, M. Lopez and P. Saint-Gregoire, 1996. Structural changes in tetraethylammonium copper chloride. Ferroelectrics, 175: 79-84.
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Mezzane, D., M. Bziouet and P. Saint-Gregoire, 1990. Influence of thermal history on dielectric anomalies in incommensurate (TMA)2ZnCl4. Ferroelectrics Lett., 11: 79-88.
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Mezzane, D., Y. Gagou, N. Aliouane, A. Flory, T. Badeche, A. Zegzouti and P. Saint-Gregoire, 2001. A DMA study of the ferroelectric-ferroelastic structure change in PbK2LiNb5O15. Izvestija Akademii Nauk, Serija Fizicheskaja, 65: 1134-1137.
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Moreira, R.L., M.A.S. Oliveira, P. Saint-Gregoire and J.Y. Gesland, 2006. Ferroelastic transitions and cracks in Li3ThF7 single crystals Ferroelectrics, 334: 57-65.
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Ondrejkovic, P., M. Kempa, Y. Vysochanskii, P. Saint-Gregoire, P. Bourges, K.Z. Rushchanskii and J. Hlinka, 2012. Neutron scattering study of ferroelectric Sn2P2S6 under pressure. Phys. Rev. B, Vol. 86. 10.1103/PhysRevB.86.224106.
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Oualla, M., A. Zegzouti, M. Elaatmani, M. Daoud, D. Mezzane, Y. Gagou and P. Saint-Gregoire, 2003. New gadolinium based ferroelectric phases derived from the Tetragonal Tungsten Bronze (TTB). Ferroelectrics, 291: 133-139.
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Ouedraogo, A., I. Lukyanchuk and P. Saint-Gregoire, 2004. Polarization rotation in the incommensurate phase of Sn2P2 (SexS1-x)6. Ferroelectrics, 302: 137-141.
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Pelaiz Barranco, A., Y. Mendez Gonzalez, D.C. Arnold, P. Saint-Gregoire, D.J. Keeble, 2012. Incorporation of lanthanide ions in lead titanate. J. Mater. Sci., 47: 1094-1099.
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Perez, A., H. Ottavi and P. Saint-Gregoire, 2000. Lattice spin model AB1B2. Comput. Mater. Sci., 18: 167-176.
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Regis, M., M. Candille, P. Saint-Gregoire, 1980. Optical study of the structural phase transition of BaMnF4. J. Phys. Lett., 41: 423-425.
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Saint-Gregoire, P. F.J. Schafer, W. Kleemann, J. Durand and A. Goiffon, 1984. Birefringence study of the α-β transformation of berlinite, AlPO4. J. Phys. C, 17: 1375-1375.
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Saint-Gregoire, P. and I. Lukyanchuk, 1997. Domain textures of multi-q modulated phases: Example of quartz. Ferroelectrics, 191: 267-273.
Saint-Gregoire, P. and A. Perez, 1983. Possible incommensurate phase in KFeF4. Z. Krist., 163: 135-138.
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Saint-Gregoire, P. and A. Perez, 1989. Prediction of modulation wave vector rotation in incommensurate crystals under field or stress. Proceedings of the 7th International Meeting of Ferroelectricity, September, 1989, Saarbrucken, Germany -.
Saint-Gregoire, P. and I. Luk'yanchuk, 1999. Comment on inhomogeneities and birefringence in quartz. J. Phys.: Condens. Matter, 11: 8169-8173.
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Saint-Gregoire, P. and V. Janovec, 1989. Analysis of linear defects in triply-incommensurate phase of quartz-type. Ferroelectrics, 97: 299-311.
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Saint-Gregoire, P. and V. Janovec, 1989. Modulated Phases in Crystals: Symmetries of Walls and Wall Lattices: Example of Quartz. In: Lecture Notes in Physics, Barthes, M. and J. Leon (Eds.). Springer Verlag, USA.
Saint-Gregoire, P., 1999. Role of the Coupling between Strains and Order Parameter Gradient in Crystals. Phase Trans., 67: 587-615.
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Saint-Gregoire, P., 1987. Intrinsic Defects in Insulating Incommensurate Crystals. In: Incommensurate Crystals, Liquid Crystals and Quasi Crystals, Scott, J.F. and N.A. Clark (Eds.). Plenum Press, USA., pp 151-162.
Saint-Gregoire, P., 1991. Change of domain structure at lock-in transitions. Phase Transitions, 30: 255-258.
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Saint-Gregoire, P., 1995. Ferroelastic incommensurate phases. Key Eng. Mater., 101-102: 237-284.
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Saint-Gregoire, P., 1996. On improper ferroelastics among incommensurate materials. Ferroelectrics, 175: 25-39.
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Saint-Gregoire, P., 1997. On mesoscopic structure of incommensurate phases: Domain textures and textural blocks. Ferroelectrics, 192: 61-70.
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Saint-Gregoire, P., 2000. On the anomalous light scattering in quartz: A critical overview and recent results. Ferroelectrics, 240: 1405-1412.
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Saint-Gregoire, P., 2008. Overview on fields related to renewable energies relevant for north south collaborations. Int. Sci. J. Alter. Energy Ecol., 5: 11-20.
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Saint-Gregoire, P., E. Snoeck and N. Aliouane, 2001. On the evolution of texture between α and β phases in quartz: Aspects relevant with the problem of the anomalous light scattering. Ferroelectrics, 252: 1-9.
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Saint-Gregoire, P., E. Snoeck, C. Roucau, I. Lukyanchuk and V. Janovec. 1996. A novel type of incommensurate phase in quartz: The elongated-triangle phase. JETP Lett., 64: 410-415.
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Saint-Gregoire, P., E. Snoeck, C. Roucau, N. Aliouane, I. Luk'yanchuk, 2003. Anomalous light scattering in quartz: Ferroelastic versus metastable EQT blocks models. Ferroelectrics, 290: 97-104.
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Saint-Gregoire, P., E. Snoeck, V. Janovec and C. Roucau, 1993. New details on the Structure of the 3-q modulated phase of quartz type. Phys. Status Solidi A, 139: 361-370.
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Saint-Gregoire, P., I. Luk'yanchuk and N. Aliouane, 2001. The Elongated-Triangle (ELT) phase in quartz as an incommensurate ferroelastic. Izvestija Akademii Nauk, Serija Fizicheskaja, 65: 1119-1126.
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Saint-Gregoire, P., I. Luk'yanchuk, E. Snoeck, C. Roucau and V. Janovec, 1995. New incommensurate elongated-triangle phase in quartz. JETP Lett., Vol. 64. 10.1134/1.567212.
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Saint-Gregoire, P., M. Barthes, R. Almairac, J. Nouet, J.Y. Gesland, C. Filippini and U. Steigenberger, 1984. On the incommensurate phase in BaMnF4: A neutron scattering study. Effect of the pressure. Ferroelectrics, 53: 307-310.
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Saint-Gregoire, P., M. Ribet and K. Tchakpele, 1989. Ferroelastic walls in lock-in phases of {N(CD3)4}2ZnCl4 and {N(CH3)4}2CuCl4. Ferroelectrics, 97: 277-292.
Saint-Gregoire, P., R. Almairac, A. Freund and J. Y.Gesland, 1986. Barium manganese fluoride BaMnF4 as an improper ferroelastic. Ferroelectrics, 67: 15-21.
Saint-Gregoire, P., R. Almairac, E. Snoeck, J. Moret and V. Kopsky, 1999. Structural organization of fullerenes C60, C70, C84. Ferroelectrics, 221: 37-46.
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Saint-Gregoire, P., R. Almairac, J. Lapasset and J. Moret, 1990. Structural phase transitions in KfeF4 and related materials. Phys. Status Solidi A, 120: K25-K29.
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Saint-Gregoire, P., V. Janovec and B. Davies, 1996. Primary and secondary domain states in the simple cubic phase of C60. Ferrolectrics, 185: 71-76.
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Saint-Gregoire, P., V. Janovec and V. Kopsky, 1997. A sample analysis of domain walls in simple cubic phase of C60. Ferroelectrics, 191: 73-78.
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Saint-Gregoire, P., V. Janovec, E. Snoeck, C. Roucau and Z. Zikmund, 1992. Domain wall vertices in Quartz: Symmetry, Classification and T.E.M. Observation. Ferroelectrics, 125: 209-214.
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Saint-Gregoire, P., W. Kleemann, F.J. Schafer and J. Moret, 1988. On the incommensurate phase in BaMnF4: sample dependence of the order parameter. J. Phys. France, 49: 463-469.
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Saint-Gregoire, P., Y. Gagou and T. Badeche, 2008. Anomalies of thermal dilatation and domain structure in the multiferroic material PbK2LiNb5O15. Ferroelectrics, 376: 17-24.
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Sannikov, D.G., R. Almairac, A. Astito, J. Moret, J. Lapasset and P.Saint-Gregoire, 1994. Phenomenological theory of the transitions in the [P(CH3)4]2 (CuCl4)x (CuBr4)1-x solid solution. J. Phys., 6: 849-849.
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Sidorkin, A.S., P. Saint-Gregoire and L.P. Nesterenko, 2013. Fatigue phenomena in thin ferroelectric films stimulated by repeated switching of the polarization. J. Adv. Dielectr., Vol. 3. .
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Smirnov, M. and P. Saint-Gregoire, 2014. Unified approach for determining tetragonal tungsten bronze crystal structures. Acta Crystallogr., Sect. A: Found. Adv., 70: 283-290.
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Smirnov, M., N. Mazhenov, N. Aliouane and P. Saint-Gregoire, 2010. Novel features of the α-β phase transition in quartz-type FePO4 as evidenced by x-ray diffraction and lattice dynamics. J. Phys. Condens. Matter, 22: 225403-225413.
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Snoeck, E., C. Roucau and P. Saint-Gregoire, 1986. Electron microscopy study of the modulated phases in berlinite AlPO4 and quartz. J. Physique, 47: 2041-2053.
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Snoeck, E., P. Saint-Gregoire, V. Janovec and C. Roucau, 1994. T.E.M. study of 3-q modulated phase of quartz-type under electric field. Ferroelectrics, 155: 371-376.
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Vaillant, L., E. Vigil, F. Forcade, T. Thami and H. Adnani et al., 2015. On fundamental mechanisms in dye sensitized solar cells through the behaviour of different mesoporous titanium dioxide films. Eur. Phys. J. Appl. Phys., Vol. 72. 10.1051/epjap/2015150221.
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Zapart, B., E. Snoeck and P. Saint-Gregoire, 1997. Dense domain structure in ferroelastics by EPR. Ferroelectrics, 191: 179-185.
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