TY - JOUR
T1 - Magnetostriction of dilute metallic rare earth alloys
T2 - LaSb: Dy and Ag:R (R= Tb, Dy, Ho, Tm)
AU - Nieuwenhuys, G. J.
AU - Davidov, D.
AU - Häfner, H. U.
AU - Bloch, J. M.
PY - 1982/7
Y1 - 1982/7
N2 - We present a method to analyze the magnetostriction of dilute rare earth alloys. It consists of a calculation of the free-energy using the complete "single ion" Hamiltonian. Our calculation nicely fits the magnetostriction data on Ag : R alloys measured by Creuzet and Campbell along the [001] direction without the need to introduce the fourth order term. The theory is also used, to analyze our magnetostriction results of LaSb: By single crystals along the [001] direction. The fitting procedure yields a second order magnetoelastic coupling constant of V(Γ3) = + 19.3K/ion which is slightly smaller than the value V(Γ3) = + 24K/ion found by Bloch and Davidov from magnetization measurements on LaSb : Dy. The difference, we believe, is due to the face that magnetization reflects the local microscopic distortion as seen by the rare-earth ion while magnetostriction measures the macroscopic "long range" distortion away from the rare-earth ions.
AB - We present a method to analyze the magnetostriction of dilute rare earth alloys. It consists of a calculation of the free-energy using the complete "single ion" Hamiltonian. Our calculation nicely fits the magnetostriction data on Ag : R alloys measured by Creuzet and Campbell along the [001] direction without the need to introduce the fourth order term. The theory is also used, to analyze our magnetostriction results of LaSb: By single crystals along the [001] direction. The fitting procedure yields a second order magnetoelastic coupling constant of V(Γ3) = + 19.3K/ion which is slightly smaller than the value V(Γ3) = + 24K/ion found by Bloch and Davidov from magnetization measurements on LaSb : Dy. The difference, we believe, is due to the face that magnetization reflects the local microscopic distortion as seen by the rare-earth ion while magnetostriction measures the macroscopic "long range" distortion away from the rare-earth ions.
UR - http://www.scopus.com/inward/record.url?scp=0020164297&partnerID=8YFLogxK
U2 - 10.1016/0038-1098(82)91151-6
DO - 10.1016/0038-1098(82)91151-6
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AN - SCOPUS:0020164297
SN - 0038-1098
VL - 43
SP - 51
EP - 55
JO - Solid State Communications
JF - Solid State Communications
IS - 1
ER -