Spin glass anomalies in stoichiometric spin-chain oxides, Ca3CoXO6 (X = Rh, Ir and Co)

Details Spin glass anomalies in stoichiometric spin-chain oxides, Ca3CoXO6 (X = Rh, Ir and Co) Spin glass anomalies in stoichiometric spin-chain oxides, Ca3CoXO6 (X = Rh, Ir and Co)

2003-09-30

arxiv.org/abs/cond-mat/0309702v1

Physics

Condensed Matter

Materials Science

To be published in solid State Physics (India), 2003

Scientific paper

The results of ac susceptibility (chi) measurements for Ca3CoXO6 (X = Rh, Ir and Co) compounds, containing spin-chains separated by Ca ions, are presented. All these compounds exhibit an unusually large frequency dependence of ac chi, in the vicinity of respective magnetic ordering temperatures, which is normally not encountered in conventional spin-glasses. The frequency dependence of ac chi, peak temperature is however found to obey Vogel-Fulcher relationship. The results thus establish that these compounds are unusual spin-glasses, that too among stoichiometric compounds presumably due to geometrical frustration.

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