High temperature spin state transitions in misfit-layered Ca3Co4O9

被引：16

作者：

Altin, S. ^{[1
]}

Aksan, M. A. ^{[1
]}

Bayri, A. ^{[1
]}

机构：

[1] Inonu Univ, Fen Edebiyat Fak, Fiz Bolumu, TR-44280 Malatya, Turkey

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2014年 / 587卷

关键词：

Spin crossover; Magnetic oxides; Ferrimagnetics; Magnetic ordering spin arrangements; THERMOELECTRIC RESPONSE; MAGNETIC-PROPERTIES; COBALT OXIDES; THIN-FILMS; CU;

D O I：

10.1016/j.jallcom.2013.10.170

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

This study reports high temperature magnetic properties of the unsubstituted one together with B and Sb-substituted Ca3Co4O9 system. The measured data indicated that there is an anomaly in the magnetic susceptibility, chi, between 680 and 920 K. It is believed that this anomaly is related to a critical threshold number of the high spin Co-ions such that when this threshold number is achieved, some exchange interactions between Co3+ and Co4+ take place which causes an abrupt increase in the chi-T curve. The anomaly was further investigated with B and Sb-substitutions. It is realized that both dopants promote more Co-ions in the rock salt unit cell to high spin state. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：40 / 44

页数：5

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