The effect of pressure on La1.5Ca0.5CoIrO6 re-entrant spin-glass

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:458

Article

Coutrim, L. T.¹  Bittar, E. M.²  Mendonca-Ferreira, L.³  Bufaical, L.¹ 

[1] Univ Fed Goias, Inst Fis, BR-74001970 Goiania, Go, Brazil

[2] Ctr Brasileiro Pesquisas Fis, Rua Dr Xavier Sigaud 150, BR-22290180 Rio De Janeiro, RJ, Brazil

[3] Univ Fed Abc, CCNH, BR-09210580 Santo Andre, SP, Brazil

关键词: Double-perovskite;    Spin glass;    Hydrostatic pressure;    Magnetic properties;   

DOI  :  10.1016/j.jmmm.2018.03.015

来源: Elsevier

【 摘 要 】

La1.5Ca0.5CoIrO6 is a re-entrant spin-glass (SG) that exhibits antiferromagnetic and ferromagnetic couplings at T similar to 95 and similar to 86 K, respectively, and at T similar to 25 K a SG phase emerges. In this work we investigated the effect of hydrostatic pressure (P) on La1.5Ca0.5CoIrO6 magnetic properties. By means of magnetization as a function of temperature measurements, carried under different applied pressures and/or magnetic fields, we have found that the freezing temperature of the SG phase exhibits an initial increase followed by a decrease with increasing P, and that the maximum P = 7.9 kbar was not sufficient to prevent the formation of the frozen state. Since the ordering temperatures of the antiferromagnetic and ferromagnetic phases are also affected by P, we discuss the results here found in terms of changes on the balance between the magnetic phases. (C) 2018 Elsevier B.V. All rights reserved.

【 授权许可】

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