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Title: Reentrant spin-glass state in a geometrical frustrated multiferroic system: Role of disorder

We investigated the effect of magnetic (Mn) and nonmagnetic (Ga) doping at the Cr site of the layered geometrically frustrated antiferromagnetic compound LiCrO{sub 2}. 10% Ga doping at the Cr site does not invoke any metastability typical of a glassy magnetic state. However, similar amount of Mn doping drives the system to a spin glass (SG) state which is particularly evident from the magnetic memory and heat capacity studies. The onset of glassy state in 10% Mn doped sample is of reentrant type developing out of higher temperature antiferromagnetic state. The SG state in the Mn-doped sample shows a true reentry with the complete disappearance of the antiferromagnetic phase below the SG transition. The lack of SG state on Ga doping indicates the importance of random ferromagnetic/antiferromagnetic bonds for the glassy ground state in LiCrO{sub 2}.
Authors:
; ;  [1] ; ;  [2]
  1. Department of Solid State Physics, Indian Association for the Cultivation of Science, 2A and B Raja S. C. Mullick Road, Kolkata 700 032 (India)
  2. UGC-DAE Consortium for Scientific Research, University Campus, Khandwa Road, Indore 452 017 (India)
Publication Date:
OSTI Identifier:
22273952
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Applied Physics; Journal Volume: 115; Journal Issue: 17; Conference: 55. annual conference on magnetism and magnetic materials, Atlanta, GA (United States), 14-18 Nov 2010; Other Information: (c) 2014 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; DOPED MATERIALS; GALLIUM COMPOUNDS; GROUND STATES; LITHIUM COMPOUNDS; MANGANESE COMPOUNDS; RANDOMNESS; SPECIFIC HEAT; SPIN GLASS STATE; TEMPERATURE DEPENDENCE