Variable-range hopping conductivity in La1−xSrxMn1−yFeyO3 (x = 0.5; y = 0, 0.02, 0.1)

References

• G. A. Samara, The relaxational properties of compositionally disordered ABO3 perovskites, J. Phys: Condens. Matter. 15 (9), R367 (2003). DOI: 10.1088/0953-8984/15/9/202.
   Web of Science ®Google Scholar
• Y. Moritomo, A. Asamitsu, and Y. Tokura, Enhanced electron-lattice coupling in La1−xSrxMnO3 near the metal-insulator phase boundary, Phys. Rev. B 56 (19), 12190 (1997). DOI: 10.1103/PhysRevB.56.12190.
   Web of Science ®Google Scholar
• V. S. Zakhvalinskii et al., Variable-range hopping conductivity of La1−xSrxMn1−yFeyO3, J. Phys: Condens. Matter. 23 (1), 015802 (2011). DOI: 10.1088/0953-8984/23/1/015802.
   PubMed Web of Science ®Google Scholar
• P. K. Siwach, H. K. Singh, and O. N. Srivastava, Low field magnetotransport in manganites, J. Phys: Condens. Matter. 20 (27), 273201 (2008). DOI: 10.1088/0953-8984/20/27/273201.
   PubMed Web of Science ®Google Scholar
• P.-G. de Gennes, Effects of double exchange in magnetic crystals, Phys. Rev. 118 (1), 141 (1960). DOI: 10.1103/PhysRev.118.141.
   Web of Science ®Google Scholar
• J. M. D. Coey, M. Viret, and S. von Molnár, Mixed-valence manganites, Adv. Phys. 48 (2), 167 (1999). DOI: 10.1080/000187399243455.
   Web of Science ®Google Scholar
• Y. Tokura, Orbital Physics in Transition-Metal Oxides, Science 288 (5465), 462 (2000). DOI: 10.1126/science.288.5465.462.
   PubMed Web of Science ®Google Scholar
• M. Ziese, Extrinsic magnetotransport phenomena in ferromagnetic oxides, Rep. Prog. Phys. 65 (2), 143 (2002). DOI: 10.1088/0034-4885/65/2/202.
   Web of Science ®Google Scholar
• C. N. R. Rao et al., Charge ordering in the rare earth manganates: the experimental situation, J. Phys: Condens. Matter. 12 (7), R83 (2000). DOI: 10.1088/0953-8984/12/7/201.
   Web of Science ®Google Scholar
• E. Dagotto, T. Hotta, and A. Moreo, Colossal magnetoresistant materials: The key role of phase separation, Phys. Rep. 344 (1-3), 1 (2001). DOI: 10.1016/S0370-1573(00)00121-6.
   Web of Science ®Google Scholar
• E. Quenneville et al., Electronic transport by small polarons in La0.5Sr0.5MnO3, J. Appl. Phys. 90 (4), 1891 (2001). DOI: 10.1063/1.1385356.
   Web of Science ®Google Scholar
• R. Laiho et al., Variable-range hopping conductivity in La1-xCaxMn1-yFeyO3: evidence of a complex gap in density of states near the Fermi level, J. Phys: Condens. Matter. 14 (34), 8043 (2002). DOI: 10.1088/0953-8984/14/34/323.
   Web of Science ®Google Scholar
• R. Laiho et al., Asymmetry of a complex gap near the Fermi level, determined from measurements of the thermopower in La1-xCaxMn1-yFeyO3, J. Phys: Condens. Matter. 16 (6), 881 (2004). DOI: 10.1088/0953-8984/16/6/016.
   Web of Science ®Google Scholar
• A. Biswas et al., The density of states of hole-doped manganites: A scanning tunneling microscopy/spectroscopy study, Phys. Rev. B 59 (8), 5368 (1999). DOI: 10.1103/PhysRevB.59.5368.
   Web of Science ®Google Scholar
• B. I. Shklovskii and A. L. Efros, Electronic properties of doped semiconductors (Springer, Berlin 1984).
   Google Scholar
• R. Laiho et al., Variable-range hopping conductivity and structure of density of localized states in LaMnO3+δ under pressure, J. Phys: Condens. Matter. 18 (45), 10291 (2006). DOI: 10.1088/0953-8984/18/45/015.
   Web of Science ®Google Scholar
• R. Laiho et al., Mechanisms of hopping conductivity in weakly doped La1−xBaxMnO3, J. Phys: Condens. Matter. 17 (21), 3429 (2005). DOI: 10.1088/0953-8984/17/21/033.
   Web of Science ®Google Scholar
• J. Dho, W. S. Kim, and N. H. Hur, Anomalous thermal hysteresis in magnetization and resistivity of La1−xSrxMnO3, Phys. Rev. Lett 87 (18), 187201 (2001). DOI: 10.1103/PhysRevLett.87.187201.
   Web of Science ®Google Scholar
• H. Fujishiro, T. Fukase, and M. Ikebe, Charge ordering and sound velocity anomaly in La1-XSrXMnO3 (X ≥ 0.5, ), J. Phys. Soc. Jpn. 67 (8), 2582 (1998). DOI: 10.1143/JPSJ.67.2582.
   Google Scholar
• K. H. Kim et al., Charge ordering fluctuation and optical pseudogap in La1-xCaxMnO3, Phys. Rev. Lett. 88 (16), 167204 (2002). DOI: 10.1103/PhysRevLett.88.167204.
   PubMed Web of Science ®Google Scholar
• A. Biswas et al., Collapse of the charge ordering gap of Nd0.5Sr0.5MnO3 in an applied magnetic field, J. Phys: Condens. Matter. 12 (6), L101 (2000). DOI: 10.1088/0953-8984/12/6/106.
   Web of Science ®Google Scholar
• J. H. Jung et al., Optical investigations of charge gap in orbital ordered La1/2Sr3/2MnO4, Phys. Rev. B 61 (10), 6902 (2000). DOI: 10.1103/PhysRevB.61.6902.
   Web of Science ®Google Scholar
• M. R. Ibarra et al., Lattice effects, stability under a high magnetic field, and magnetotransport properties of the charge-ordered mixed-valence La0.35Ca0.65MnO3 perovskite, Phys. Rev. B 56 (13), 8252 (1997). DOI: 10.1103/PhysRevB.56.8252.
   Web of Science ®Google Scholar
• R. D. Shannon, Revised effective ionic radii and systematic studies of interatomic distances in halides and chalcogenides, Acta Cryst. A 32 (5), 751 (1976). DOI: 10.1107/S0567739476001551.
   Web of Science ®Google Scholar
• G. Jonker, Semiconducting properties of mixed crystals with perovskite structure, Physica 3 (7-12), 1118 (1954). DOI: 10.1016/S0031-8914(54)80352-1.
   Google Scholar
• S. B. Ogale et al., Transport properties, magnetic ordering, and hyperfine interactions in Fe-doped La0.75Ca0.25MnO3: Localization-delocalization transition, Phys. Rev. B 57 (13), 7841 (1998). DOI: 10.1103/PhysRevB.57.7841.
   Web of Science ®Google Scholar
• K. H. Ahn et al., Magnetic properties and colossal magnetoresistance of La(Ca)MnO3 materials doped with Fe, Phys. Rev. B 54 (21), 15299 (1996). DOI: 10.1103/PhysRevB.54.15299.
   PubMed Web of Science ®Google Scholar
• T. S. Orlova et al., Effect of Fe doping on structure, charge ordering, magnetic and transport properties of La0.33Ca0.67Mn1−yFeyO3 (0 ≤ y ≤ 0.06, ), J. Phys: Condens. Matter 18 (29), 6729 (2006). DOI: 10.1088/0953-8984/18/29/013.
   Web of Science ®Google Scholar
• V. S. Zakhvalinskii et al., Electrical conductivity and magnetic properties of La1−xCaxMn1−yFeyO3 ceramic samples (x = 0.67, y = 0, 0.05), Phys. Solid State 50 (1), 63 (2008). DOI: 10.1134/S1063783408010137.
   Web of Science ®Google Scholar
• G. Zhang and J. Lin, Synthesis, electronic and magnetic properties of the double B mixed perovskite series La0.5Sr0.5Mn1−xFexO3, J. Alloys Compd. 507 (1), 47 (2010). DOI: 10.1016/j.jallcom.2010.07.162.
   Web of Science ®Google Scholar
• R. Laiho, Lattice distortions, magnetoresistance and hopping conductivity in LaMnO3+, δ, J. Phys: Condens. Matter. 17 (1), 105 (2005). DOI: 10.1088/0953-8984/17/1/011.
   PubMed Web of Science ®Google Scholar
• O. Z. Yanchevskii et al., Crystallographic, electrical, and magnetic properties of the system La0.7Sr0.3Mn1−xFexO3, Low Temp. Phys. 32 (2), 134 (2006). DOI: 10.1063/1.2171513.
   Web of Science ®Google Scholar
• N. F. Mott and E. A. Davis, Electronic processes in non-crystalline materials (Oup, Oxford, 2012)
   Google Scholar
• N. T. Dang et al., Crystal structure, magnetic properties and conductivity mechanisms of La0.7Ca0.3Mn0.5Fe0.5O3, Ferroelectrics 501 (1), 129 (2016). DOI: 10.1080/00150193.2016.1203212.
   Web of Science ®Google Scholar
• M. Viret, L. Ranno, and J. M. D. Coey, Magnetic localization in mixed-valence manganites, Phys. Rev. B 55 (13), 8067 (1997). DOI: 10.1103/PhysRevB.55.8067.
   Web of Science ®Google Scholar
• C. M. Varma, Electronic and magnetic states in the giant magnetoresistive compounds, Phys. Rev. B 54 (10), 7328 (1996). DOI: 10.1103/PhysRevB.54.7328.
   Web of Science ®Google Scholar
• A. S. Alexandrov and A. M. Bratkovsky, Massive spectral weight transfer and colossal magneto-optical effect in doped manganites, J. Appl. Phys. 87 (9), 5016 (2000). DOI: 10.1063/1.373233.
   Web of Science ®Google Scholar