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Title: Site preference and compensation behavior in Co(Cr, Mn){sub 2}O{sub 4} system

Site preference of doped Mn ions in CoCr{sub 2−x}Mn{sub x}O{sub 4} (x = 0–2) series has been derived separately from structure and magnetic measurement. It shows that parts of the doped Mn ions occupy the A (Co) sites when x < 0.5. And then, it takes the two B (Cr) sites in turn before and after x = 1.3. This site preference behavior results in a role conversion of the magnetic contributors and, thus, leads to the composition dependent magnetic compensation. Temperature induced compensation and negative magnetization have also been found in several samples, which is attributed to the large energy barrier between the ferromagnetic and antiferromagnetic spin arrangement. A structure transition from cubic to tetragonal symmetry has been detected.
Authors:
 [1] ;  [2] ; ;  [3] ; ; ;  [1]
  1. State Key Laboratory of Magnetism, Institute of Physics and Beijing National Laboratory for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190 (China)
  2. (China)
  3. College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124 (China)
Publication Date:
OSTI Identifier:
22409982
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 117; Journal Issue: 17; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; ANTIFERROMAGNETISM; CHROMATES; COBALT COMPOUNDS; CONCENTRATION RATIO; CRYSTAL STRUCTURE; CUBIC LATTICES; DOPED MATERIALS; FERROMAGNETISM; MAGNETIZATION; MANGANATES; MANGANESE IONS; PHASE TRANSFORMATIONS; SPIN; TEMPERATURE DEPENDENCE; TETRAGONAL LATTICES