Metal-insulator transition in layered manganites: (La{sub 1{minus}z}Nd{sub z}){sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7}

Journal Article · Mon Sep 01 04:00:00 EDT 1997 · Physical Review, B: Condensed Matter

DOI:https://doi.org/10.1103/PhysRevB.56.R7057· OSTI ID:542652

Moritomo, Y; Maruyama, Y; Akimoto, T; Nakamura, A ^[1]

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1. Center for Integrated Research in Science and Engineering (CIRSE), and Department of Applied Physics, Nagoya University, Nagoya 464-01 (Japan)

Lattice effects on the anisotropic magnetic and transport properties have been investigated for single crystals of (La{sub 1{minus}z}Nd{sub z}){sub 1.2}Sr{sub 1.8}Mn{sub 2}O{sub 7} with a layered structure. The ferromagnetic transition temperature T{sub C} is suppressed from T{sub C}=130 K for z=0.0 to 80 K for z=0.2, and eventually the transition disappears beyond z=0.4. From the significant change of the magnetic anisotropy, we have found that the suppression originates from the increasing d{sub 3z{sup 2}{minus}r{sup 2}} character in the occupied e{sub g} state due to the Jahn-Teller distortion of the MnO{sub 6} octahedra. Our observations indicate that the effects of chemical substitution are qualitatively different between the cubic and layered doped manganites. {copyright} {ital 1997} {ital The American Physical Society}

• OSTI ID: 542652
• Journal Information: Physical Review, B: Condensed Matter, Journal Name: Physical Review, B: Condensed Matter Journal Issue: 12 Vol. 56; ISSN PRBMDO; ISSN 0163-1829
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CURIE POINT
ELECTRIC CONDUCTIVITY
FERROMAGNETIC MATERIALS
FERROMAGNETISM
JAHN-TELLER EFFECT
LANTHANUM COMPOUNDS
LANTHANUM OXIDES
LAYERS
MAGNETIC PROPERTIES
MANGANESE OXIDES
MONOCRYSTALS
NEODYMIUM COMPOUNDS
NEODYMIUM OXIDES
STRONTIUM COMPOUNDS
STRONTIUM OXIDES
TRANSITION TEMPERATURE