Influence of Ti Substitution on the Critical Properties of CuxCryTizSe4 (z = 0.24 and 0.35)

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Magnetization, M, and susceptibility, , measurements of CuxCryTizSe4 (z = 0.24 and 0.35) showed both strong lowering of magnetic moment in comparison with CuCr2Se4 matrix and zero-field-cooling (ZFC) – field-cooling (FC) susceptibility splitting characteristic for the spin-glass (SG) behaviour. Isothermal magnetization curves, M(H), easy saturate and large both the Curie (TC ~ 250 K) and Curie-Weiss (θCW ~ 280 K) temperatures indicate the ferromagnetic order which coexists with the SG state. The critical behaviour of polycrystalline CuxCryTizSe4 spinels investigated around the paramagnetic–ferromagnetic (PM-FM) phase transition revealed that the values of critical exponents are close to those predicted by the mean field model for long-range interactions only for Cu1.02Cr1.77Ti0.24Se4. It means that the larger spin frustration the more difficulty is it to describe the critical properties with the aid of the theoretical models.

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Periodical:

Solid State Phenomena (Volume 194)

Edited by:

Yuriy Verbovytskyy and António Pereira Gonçalves

Pages:

144-147

Citation:

J. Krok-Kowalski et al., "Influence of Ti Substitution on the Critical Properties of CuxCryTizSe4 (z = 0.24 and 0.35)", Solid State Phenomena, Vol. 194, pp. 144-147, 2013

Online since:

November 2012

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