Magnetic structures of the Eu and Cr moments in EuCr$_{2}$ As$_{2}$ : Neutron diffraction study

Brückel, Th.; Hossain, Z.; Jin, W. T.; Nandi, S.; Ouladdiaf, B.; Paramanik, U. B.; Qureshi, N.; Su, Y.; Xiao, Y.

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Magnetic structures of the Eu and Cr moments in EuCr $_{2}$ As $_{2}$ : Neutron diffraction study

Authors: Th. Brückel
Z. Hossain
W. T. Jin
S. Nandi
B. Ouladdiaf
U. B. Paramanik
N. Qureshi
Y. Su
Y. Xiao
Publication date: 1 January 2016
Publisher: 'American Physical Society (APS)'
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Abstract

The magnetic structures of the Eu2+ and Cr2+ moments in the nonsuperconducting parent compound EuCr2As2 have been determined by using neutron diffraction. While the Eu2+ moments order ferromagnetically with moments along the c direction at TC=21.0(1) K, the ordering temperature of the Cr2+ moments is found to be at very high temperature of 680(40) K by using magnetization measurements. The Cr2+ moments order in a G-type antiferromagnetic structure with moments along the c direction. According to this magnetic structure, the nearest-neighbor Cr2+ moments are antiferromagnetically aligned in the a−b plane as well as in the c direction. The ordered magnetic moment of the Eu2+ and Cr2+ amounts to 6.2(5)μB and 1.7(4)μB, respectively, at T=2 K