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

Abstract

The crystal structures, magnetization, and spontaneous magnetostriction of ferromagnetic Laves phase Pr1 − x Tbx Fe1.9 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 Pr1 − x Tb x Fe1.9 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 PrFe1.9 than that of TbFe1.9, as well as the decrease of the resulting anisotropy due to Tb substitution at low temperatures.

Electronic structures, magnetic properties, and martensitic transformation in all-d-metal Heusler-like alloys Cd2MnTM (TM = Fe, Ni, Cu)*

“…In the process of FMMT, there are usually accompanied by various physical properties, such as magnetic-field-induced recovery, magnetocaloric effect, barocaloric effect, exchange bias, magnetoresistance, and magnetostrain. [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19] Recently, the all-d-metal Heusler-like alloys based on dd hybridization by substituting transition metal (T M) with less valence electrons for main group element in classic Heusler alloys were reported. [20,21] The metamagnetic MTs and corresponding multifunctional properties (magneticentropy change, [20] field-induced strain, [21] giant elastocaloric effect [11,22,23] ) were gained in MnNiTi(Co) system.…”

Enhanced magnetoelastic performance in Pr/Mn-doped Laves phase (Tb,Ho)Fe2 compounds

“…Together with the anisotropy nature that the sign of K 1 is positive for PrFe 2 , opposite to that of TbFe 2 , it is thought that the anisotropy compensation system (Tb,Pr)Fe 2 will be a promising magneto-elastic candidate for applications. In fact, the study and application of Pr-containing RFe 2 Laves phase compounds have been a key issue in the last few years [5][6][7][8][9][10]. Many efforts have been focused on the synthesis of single Laves phase so as to expand the Pr solid solubility, wherein the preparation process was mainly paid to the arc melting with the Fe partial substitution by other transition metals (e.g.…”