The effect of pressure on La1:5Ca0:5CoIrO6 re-entrant spin-glass
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2018
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La1:5Ca0:5CoIrO6 is a re-entrant spin-glass (SG) that exhibits antiferromagnetic and ferromagnetic couplings at T 95 and 86 K, respectively, and at T 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.
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Double-perovskite, Spin glass, Hydrostatic pressure, Magnetic properties
Citação
COUTRIM, L. T.; BITTAR, E. M.; MENDONÇA-FERREIRA, L.; BUFAIÇAL, L. The effect of pressure on La1:5Ca0:5CoIrO6 re-entrant spin-glass. Journal of Magnetism and Magnetic Materials, Amsterdam, v. 458, p. 105-108, 2018. DOI: 10.1016/j.jmmm.2018.03.015. Disponível em: https://www.sciencedirect.com/science/article/pii/S0304885317338799. Acesso em: 16 fev. 2024.