Anomalous remnant magnetization in dilute antiferromagnetic Gd 1 − x Y x B 4

Phys. Rev. Materials

25 de outubro de 2018 LAbI UFSCar Artigo 0

Anomalous remnant magnetization in dilute antiferromagnetic ${Gd}_{1 - x} Y_{x} B_{4}$

Abstract: Magnetic properties of dilute single crystals of ${Gd}_{1 - x} Y_{x} B_{4}$ ( $x = 0$ , 0.2, and 0.4) were systematically studied. These antiferromagnetic Shastry-Sutherland compounds display a remnant magnetization $M_{R}$ when field cooled below the Néel temperature $T_{N}$ . The magnitude of $M_{R}$ at low magnetic fields is magnetic field dependent, increasing with increasing magnetic fields, and it saturates for $H \leq 30$ Oe. The $M_{R} (T)$ data for both $x = 0.2$ and 0.4 compositions overlap, and the remnant magnetization follows a universal behavior. We argue that these findings are explained by taking into account the formation of magnetic domains within the crystals, originating from the dilution of a magnetically frustrated, antiferromagnetic sublattice.

Authors: S. H. Masunaga, V. B. Barbeta, R. F. Jardim, C. C. Becerra, M. S. Torikachvili, P. F. S. Rosa, and Z. Fisk

Phys. Rev. Materials

Volume 2, 084415 – Published 31 August 2018

DOI: https://doi.org/10.1103/PhysRevMaterials.2.084415

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O Laboratório Aberto de Interatividade para Disseminação do Conhecimento Científico e Tecnológico (LAbI), vinculado à Universidade Federal de São Carlos (UFSCar), é voltado à prática da divulgação científica pautada na interatividade; nas relações entre Ciência, Arte e Tecnologia.