Influence of Tb on easy magnetization direction and magnetostriction of PrFe1.9 alloy

doi:10.1088/1674-1056/ab47f6

Abstract The crystal structures, magnetization, and spontaneous magnetostriction of ferromagnetic Laves phase Pr_1-xTb_xFe_1.9 compounds are investigated in a temperature range between 5 K and 300 K. High resolution synchrotron x-ray diffraction (XRD) analysis shows that different proportions of Tb in Pr_1-xTb_xFe_1.9 alloys can result in different easy magnetization directions (EMD) below 70 K, i.e.,[100] with x=0.0, and[111] with x ≥ 0.1. This indicates Tb substitution can lead the EMD to change from[100] to[111] with x rising from 0.0 up to 0.1. The Tb substitution for Pr reduces the saturation magnetization M_s and the magnetostriction to their minimum value when x=0.6, but it can increase low-field (0 ≤ H ≤ 9 kOe, the unit 1 Oe=79.5775 A·m^-1) magnetostriction when x=0.8 and 1.0 at 5 K. This can be attributed to the larger magnetostriction of PrFe_1.9 than that of TbFe_1.9, as well as the decrease of the resulting anisotropy due to Tb substitution at low temperatures.

Keywords: Tb substitution spin reorientation magnetostriction easy magnetization direction (EMD)

Received: 02 June 2019
Revised: 19 September 2019
Accepted manuscript online:

PACS:	75.50.Bb	(Fe and its alloys)
	75.80.+q	(Magnetomechanical effects, magnetostriction)

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 51901052) and the Science Foundation of Guangxi Zhuang Autonomous Region, China (Grant No. 2018GXNSFAA281294).

Corresponding Authors: Yan-Mei Tang, Xiang Li
E-mail: tangym0707@163.com;xli1984@hotmail.com

Cite this article:

Chang-Xuan He(何昌璇), Yan-Mei Tang(唐妍梅), Xiang Li(李翔), Yun He(何云), Cai-Yan Lu(陆彩燕), Ze-Ping Guo(郭泽平) Influence of Tb on easy magnetization direction and magnetostriction of PrFe_1.9 alloy 2019 Chin. Phys. B 28 117501

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Influence of Tb on easy magnetization direction and magnetostriction of PrFe1.9 alloy

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Influence of Tb on easy magnetization direction and magnetostriction of PrFe_1.9 alloy