Published July 1, 2000 | Version v1
Journal article Metadata-only

Local lattice disorder in the geometrically frustrated spin-glass pyrochlore Y2Mo2O7

Creators

  • 1. Los Alamos National Laboratories, Los Alamos, New Mexico 87545 (United States)
  • 2. Chemical Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720 (United States)
  • 3. Department of Physics, University of California, Santa Cruz, California 95064 (United States)
  • 4. Dupont Central Research and Development, Experimental Station, Wilmington, Delaware 19880 (United States)

Description

The geometrically frustrated spin-glass Y2Mo2O7 has been widely considered to be crystallographically ordered with a unique nearest-neighbor magnetic exchange interaction, J. To test this assertion, we present x-ray-absorption fine-structure results for the Mo and Y K edges as a function of temperature and compare them to results from a well-ordered pyrochlore, Tl2Mn2O7. We find that the Mo-Mo pair distances are significantly disordered at approximately right angles to the Y-Mo pairs. These results strongly suggest that lattice disorder nucleates the spin-glass phase in this material

Additional details

Identifiers

DOI
10.1103/PhysRevB.62.R755;
arXiv
arXiv:cond-mat/0005316v1;
PII
S0163-1829(00)50926-6;

Publishing Information

Journal Title
Physical Review. B, Condensed Matter and Materials Physics
Journal Volume
62
Journal Issue
2
Journal Page Range
p. R755-R758
ISSN
1098-0121

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
35075745
Subject category
S36: MATERIALS SCIENCE; S75: CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY;
Descriptors DEI
ABSORPTION; ABSORPTION SPECTRA; EXCHANGE INTERACTIONS; FINE STRUCTURE; INTERATOMIC DISTANCES; NUCLEATION; PYROCHLORE; SPIN GLASS STATE; TEMPERATURE DEPENDENCE; X-RAY SPECTRA; YTTRIUM COMPOUNDS
Descriptors DEC
DISTANCE; INTERACTIONS; MINERALS; SORPTION; SPECTRA; TRANSITION ELEMENT COMPOUNDS

Optional Information

Notes
(c) 2000 The American Physical Society