Open AccessMagetostriction, spin reorientation and M?ssbauer effect studies of Tb0.3Dy0.7－xPrx(Fe0.9Al0.1)1.95 alloys
Author(s) -
Zheng Xiaoping,
Peifeng Zhang,
Fan Duo-Wang,
Fashen Li,
Hao Yuan
Publication year - 2007
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.56.535
Subject(s) - magnetostriction , magnetocrystalline anisotropy , materials science , condensed matter physics , laves phase , anisotropy , lattice constant , magnetization , mössbauer spectroscopy , magnetic anisotropy , crystallography , magnetic field , intermetallic , metallurgy , chemistry , physics , alloy , quantum mechanics , diffraction , optics
The effect of Pr substitution for Dy on the structure, magnetostriction, anisotropy and spin reorientation of a series of Tb0.3Dy0.7-xPrx(Fe0.9Al0.1)1.95 alloys (x=0, 0.1, 0.20, 0.25, 0.30, 0.35) at room temperature has been investigated. It was found that the Tb0.3Dy0.7-xPrx(Fe0.9Al0.1)1.95 substantially retained the MgCu2-type C-15 cubic Laves phase structure for compositions with x≤0.1 and the lattice constant increases slowly with increasing x. The magnetostriction of the Tb0.3Dy0.7-xPrx(Fe0.9Al0.1)1.95 alloys decreases drastically with increasing x and the magnetostrictive effect disappears for x>0.2. However, the magnetostriction shows a slightly bigger value at x=0.1 than the free alloys and is saturated more easily with the magnetic field H, showing that a small amount of Pr substitution is beneficial to the decrease in the magnetocrystalline anisotropy. The spontaneous magnetostriction λ111 increases linearly with incresasing x whereas the spin reorientation temperature increases first and then decreases rapidly. The analysis of the Mssbauer spectra indicated that the easy magnetization direction in the {110} plane deviates slightly from the main axis of symmetry with the increase in Pr concentration x namely the spin reorientation. Compared with the Al substitutionthe effect of Pr substitution for Dy on the spin reorientation is smaller.