Large spontaneous volume magnetostriction of Mn-Rh alloys

Author

Yamauchi, R. ; Fukamichi, K. ; Yamauchi, H. ; Sasao, K. ; Yamada, K.

Author_Institution

Dept. of Mater. Sci., Tohoku Univ., Sendai, Japan

Volume

35

Issue

5

fYear

1999

fDate

9/1/1999 12:00:00 AM

Firstpage

3799

Lastpage

3801

Abstract

The differential scanning calorimetry (DSC) curves and the temperature dependence of magnetic susceptibility for γ-MnRh ordered alloys show a marked peak associated with the magnetic transition. The Neel temperature of Mn₇₇Rh₂₃ and Mn₇₅Rh₂₅ ordered alloys is determined to be about 830 and 850 K, respectively. The paramagnetic susceptibility increases with increasing temperature, showing an itinerant electron characteristics. The thermal expansion coefficient becomes small below the Neel temperature due to a large spontaneous volume magnetostriction, taking about 5×10^-6/K around room temperature. Such alloys with a small thermal expansion coefficient would induce some strain in multilayers because of the difference between the thermal expansion

Keywords

Neel temperature; antiferromagnetic materials; band model of magnetism; differential scanning calorimetry; magnetic susceptibility; magnetostriction; manganese alloys; rhodium alloys; thermal expansion; γ-MnRh ordered alloys; DSC; Mn-Rh alloys; Mn₇₅Rh₂₅; Mn₇₇Rh₂₃; Neel temperature; differential scanning calorimetry; itinerant electron characteristics; large spontaneous volume magnetostriction; magnetic susceptibility; magnetic transition; multilayers; paramagnetic susceptibility; room temperature; strain; temperature dependence; thermal expansion coefficient; Calorimetry; Electrons; Magnetic field induced strain; Magnetic multilayers; Magnetic susceptibility; Magnetostriction; Manganese alloys; Paramagnetic materials; Temperature dependence; Thermal expansion;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.800669

Filename

800669