Published June 1, 2002 | Version v1
Journal article Metadata-only

Magnetization distribution in the layered colossal magnetoresistance manganite La1.2Sr1.8Mn2O7 from polarized neutron diffraction

Creators

  • 1. Materials Science Division, Argonne National Laboratory, Argonne, Illinois 60439 (United States)
  • 2. Institut Max Von Laue-Paul Langevin, Boite Postale 156, 38042 Grenoble Cedex 09 (France)
  • 3. NPMR, Chalk River Laboratories, Building 459, Stn. 18, Chalk River, ON, KOJ 1JO (Canada)
  • 4. MSK764, Los Alamos National Laboratory, Los Alamos, New Mexico 87545 (United States)

Description

In the ferromagnetic metallic state of the colossal magnetoresistive (CMR) manganite La1.2Sr1.8Mn2O7, the spin-density distribution is essentially in agreement with the standard picture in which the unpaired electrons occupy the three t2g orbitals dxy, dyz, and dxz. However we find a small spin density (∼4% of the total Mn spin) on the apical O(2) oxygen atom at both 100 and 220 K, and we suggest that this is due to covalency effects. Surprisingly we find no evidence of spin on the other apical oxygen O(1) suggesting that the Mn eg electron distribution along the c axis is highly anisotropic

Additional details

Identifiers

DOI
10.1103/PhysRevB.65.214431;
arXiv
arXiv:cond-mat/0106383v2;

Publishing Information

Journal Title
Physical Review. B, Condensed Matter and Materials Physics
Journal Volume
65
Journal Issue
21
Journal Page Range
p. 214431-214431.5
ISSN
1098-0121

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
36001175
Subject category
S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; S36: MATERIALS SCIENCE;
Descriptors DEI
ANISOTROPY; COVALENCE; DISTRIBUTION; ELECTRONS; FERROMAGNETIC MATERIALS; LANTHANUM COMPOUNDS; MAGNETIZATION; MAGNETORESISTANCE; MANGANATES; NEUTRON DIFFRACTION; OXYGEN; SPIN; STRONTIUM COMPOUNDS
Descriptors DEC
ALKALINE EARTH METAL COMPOUNDS; ANGULAR MOMENTUM; COHERENT SCATTERING; DIFFRACTION; ELECTRIC CONDUCTIVITY; ELECTRICAL PROPERTIES; ELEMENTARY PARTICLES; ELEMENTS; FERMIONS; LEPTONS; MAGNETIC MATERIALS; MANGANESE COMPOUNDS; MATERIALS; NONMETALS; OXYGEN COMPOUNDS; PARTICLE PROPERTIES; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SCATTERING; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
(c) 2002 The American Physical Society