Magnetic structures of Zr6CoAs2-type Ho6−xErxMnBi2 solid solutions期刊界 All Journals 搜尽天下杂志传播学术成果专业期刊搜索期刊信息化学术搜索

Magnetic structures of Zr₆CoAs₂-type Ho_6−xEr_xMnBi₂ solid solutions

Authors:	AV Morozkin O Isnard P Henry P Manfrinetti R Nirmala SK Malik

Affiliation:	^aDepartment of Chemistry, Moscow State University, Leninskie Gory, House 1, Building 3, GSP-2, Moscow 119992, Russia ^bInstitute Laue-Langevin, 6 Rue J. Horowitz, 38042 Grenoble, France ^cLaboratoire de Cristallographie du CNRS, Université J. Fourier, BP166X, 38042 Grenoble, France ^dDipartimento di Chimica, Universitа di Genova, Via Dodecaneso 31, 16146 Genova, Italy ^eTata Institute of Fundamental Research, Mumbai 400005, India ^fInternational Centre for Condensed Matter Physics (ICCMP), University of Brasilia, Brasilia, Brazil

Abstract:	Investigations were made by neutron diffraction on Zr₆CoAs₂-type (space group no. 189) Ho_6?xEr_xMnBi₂ solid solutions. The ferromagnetic ordering temperature decreases from Ho₆MnBi₂ (T_C = 200(6) K) to Er₆MnBi₂ (T_C = 100(4) K), whereas temperatures of ferrimagnetic (or antiferrimagnetic) ordering (T_Ferri and T_AFerri) are found to have non-monotonic dependences on the content of Er: T_Ferri = 58(4) K for Ho₆MnBi₂, T_Ferri = 162(4) K for Ho_4.5Er_1.5MnBi₂, T_Ferri = 150(4) K for Ho₃Er₃MnBi₂, T_AFerri = 78(4) K for Ho_1.5Er_4.5MnBi₂ and T_AFerri = 52(4) K for Er₆MnBi₂. In these compounds, no local moment was detected on the manganese ion site, except for Ho_1.5Er_4.5MnBi₂ and Er₆MnBi₂ compounds. The manganese magnetic moments (μ_Mn) is 1.5μ_B and these are antiferromagnetically coupled with that of rare earth moments.

Keywords:	Rare earth intermetallics Magnetically ordered materials Neutron diffraction
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