Low temperature magnetization and magnetostriction of single crystal TmFe/sub 2/

Journal Article · Wed Mar 01 04:00:00 EST 1978 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.324766· OSTI ID:5056716

Abbundi, R; Clark, A E

The magnetization and magnetostriction of single crystal TmFe/sub 2/ were measured as a function of temperature from 4 K to 300 K. TmFe/sub 2/, because of its highly anisotropic 4f charge distribution, displays a huge magnetocrystalline anisotropy (K/sub 1/) and magnetostriction (lambda/sub 111/) at cryogenic temperatures in spite of the high cubic symmetry of the C15 lattice and the tetrahedral symmetry of the Tm/sup 3 +/ site. The anisotropy spans the range from -5.3 x 10/sup 5/ erg/cm/sup 3/ at room temperature to the extrapolated value of -5 x 10/sup 8/ erg/cm/sup 3/ at 0 K. The saturated magnetic moment was found to be 74 emu/g, which is substantially larger than previous polycrystalline results. Magnetostriction measurements are consistent with vertical-barlambda/sub 111/vertical-bar>>vertical-barlambda/sub 100/vertical-bar, and yield a saturation value of lambda/sub 111/(0) =-3520 x 10/sup -6/, which is appreciably larger than that previously reported. The rapid fall of the Tm/sup 3 +/ sublattice moment with temperature results in a rather low value of lambda/sub 111/=-210 x 10/sup -6/ at 300 K. The temperature dependence of lambda/sub 111/ closely follows single-ion magnetoelastic theory.

• Research Organization: Naval Surface Weapons Center, White Oak, Silver Spring, Maryland 20910
• OSTI ID: 5056716
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 49:3; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOY SYSTEMS
ALLOYS
ANISOTROPY
BINARY ALLOY SYSTEMS
CRYSTALS
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIZATION
MAGNETOSTRICTION
MONOCRYSTALS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
TEMPERATURE DEPENDENCE
THULIUM ALLOYS