Liquid-to-glass transition in the cluster-spin-glass Zn0.5Co0.5FeCrO4

Muraleedharan, K. ; Srivastava, J. K. ; Marathe, V. R. ; Vijayaraghavan, R. (1986) Liquid-to-glass transition in the cluster-spin-glass Zn0.5Co0.5FeCrO4 Solid State Communications, 60 (6). pp. 485-488. ISSN 0038-1098

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The ac susceptibility and low field magnetization measurements indicate a magnetic ordering in the disordered spinel system Zn0.5Co0.5FeCrO4 at Tf~147K with features typical of a 'cluster spin glass'. Although for T > Tf, the remanent magnetization is found to be nonzero, no Zeeman splitting is observed in the Fe57 Mössbauer spectra at the same temperature. The spectrum gradually changes from a single line at T≫Tf to finally a broad sextuplet suggestive of a gradual evolution of spin clusters on lowering the temperature. The region Tf < T < 2Tf may be considered as a 'liquid like' state of the coupled spin system, where the clusters possess rotational freedom in the spin space which vanishes at Tf once they are frozen.

Item Type:Article
Source:Copyright of this article belongs to Elsevier Science.
ID Code:61831
Deposited On:15 Sep 2011 11:40
Last Modified:15 Sep 2011 11:40

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