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Structure and magnetic properties of Er3(Fe, Co, M)29 compounds (M=Cr, V, Ti, Mn, Ga, Nb)

Shen Jiang Chen Nan-Xian Li Yang-Xian Meng Fan-Bin Wu Guang-Heng Yang Fu-Ming Jia Lin Luo Hong-Zhi

Structure and magnetic properties of Er3(Fe, Co, M)29 compounds (M=Cr, V, Ti, Mn, Ga, Nb)

Shen Jiang, Chen Nan-Xian, Li Yang-Xian, Meng Fan-Bin, Wu Guang-Heng, Yang Fu-Ming, Jia Lin, Luo Hong-Zhi
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  • Received Date:  20 January 2005
  • Accepted Date:  31 March 2005
  • Published Online:  20 November 2005

Structure and magnetic properties of Er3(Fe, Co, M)29 compounds (M=Cr, V, Ti, Mn, Ga, Nb)

  • 1. (1)北京科技大学应用物理研究所,北京 100083; (2)河北工业大学材料学院,天津 300130; (3)中国科学院物理研究所北京凝聚态物理国家实验室,北京 100080; (4)中国科学院物理研究所北京凝聚态物理国家实验室,北京 100080;北京科技大学应用物理研究所,北京 100083; (5)中国科学院物理研究所北京凝聚态物理国家实验室,北京 100080;河北工业大学材料学院,天津 300130

Abstract: A series of Er3(Fe, Co, M)29 (M=Cr, V, Ti, Mn, Ga, Nb) compounds has been synthesized and their structure and magnetic properties have been investigates by means of x-ray diffraction and magnetic measurements. It is found that the Fe-based Er3(Fe,M)29 compounds crystallize in the Th2Ni17-type structure with disordered substitution of the dumbbell Fe-Fe, instead of Nd3(Fe,Ti)29-type structure, so its chemical formula can also be expressed as Er2-n(Fe,M)17+2n (n=0.2). Substitution of M for Fe in the Er3Fe29 compound leads to an increase in the Curie temperature. With the substitution of Co for Fe in the Er3(Fe,M)29 (M=Cr, V) compounds, a new phase was found which crystallizes in monoclinic symmetry. The anisotropy of the Er3Fe19.5Co6V3.5 compound at room temperature is of easy-axis type and a spin reorientation transition from the easy-axis type to the easy-plane type anisotropy occurs when temperature decreases to 162K. A first order magnetization process (FOMP) was observed in the HMD magnetization curve of Er3Fe19.5Co6V3.5 at 5K, the critical field of the FOMP was derived to be 3.8T.

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