Title :
Multiple easy-axis changes in magnetostrictive Tb0.88Dy 0.12Zn
Author :
Cullen, J.R. ; Teter, J.P. ; Wun-Fogle, M. ; Restorff, J.B. ; Clark, A.E.
Author_Institution :
Carderock Div., Naval Surface Warfare Center, Bethesda, MD, USA
fDate :
9/1/1999 12:00:00 AM
Abstract :
Magnetization measurements were made on a single crystal sample of Tb0.88Dy0.12Zn from 4 K to room temperature. Easy-axis reorientations were found at about 46 K, 42.5 K, and 10 K. The presences of [100] easy, [uv0] easy and [110] easy and a return to a second [uv0] easy phase were deduced from these data. A discontinuous change in easy direction at 63 K was found for a TbZn single crystal. Magnetostriction measurements were made under compression at 77 K on a single crystal rod of Tb0.88Dy0.12Zn. λ100 was determined to be 0.53%. An interpretation of the magnetization vs. magnetic field orientation data is given based on a phenomenological model. In particular, it is noted that two maxima in the magnetization vs. orientation curves are consequences of low magnetic anisotropy; they do not imply the coexistence of two free energy minima
Keywords :
dysprosium alloys; ferromagnetic materials; magnetic anisotropy; magnetisation; magnetostriction; terbium alloys; zinc alloys; 4 to 300 K; Tb0.88Dy0.12Zn; TbZn single crystal; easy-axis reorientations; free energy minima; low magnetic anisotropy; magnetic field orientation data; magnetization measurements; magnetostriction measurements; magnetostrictive Tb0.88Dy0.12Zn; multiple easy-axis changes; phenomenological model; single crystal rod; single crystal sample; Goniometers; Magnetic field measurement; Magnetic hysteresis; Magnetization; Magnetostriction; Performance evaluation; Phase measurement; Position measurement; Temperature dependence; Zinc;
Journal_Title :
Magnetics, IEEE Transactions on
