Effect of manganese substitution in erbium-iron-manganese-boron: Spin reorientation, moment compensation, and structure

Journal Article · Sun Mar 15 04:00:00 EST 1987 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.337942· OSTI ID:6816020

Fuerst, C D; Meisner, G P; Pinkerton, F E

The importance of the Nd/sub 2/Fe/sub 14/B tetragonal phase to permanent magnet technology has led to the study of systems with rare-earth and transition-metal substitutions. We report on alloys formed by replacing iron with manganese in the Er/sub 2/Fe/sub 14/B system. Samples were characterized by x-ray diffraction, thermal analysis, and magnetization measurements. The 2-14-1 tetragonal lattice type forms for a large fraction of manganese substitution but not the entire range. The Curie temperature decreases rapidly from 560 K for Er/sub 2/Fe/sub 14/B to 20 K for alloys with high concentrations of manganese. The spin reorientation temperature also decreases, but not as rapidly. Compensation points were observed in the temperature dependence of the magnetization for intermediate manganese concentrations. The rapid decrease in the magnetization with Mn substitution indicates that, in addition to replacing a Fe moment, Mn lowers the average moment of the remaining Fe atoms. The linear response of the magnetization to the applied field arises from a noncollinear moment structure.

• Research Organization: Physics Department, General Motors Research Laboratories, Warren, Michigan 48090-9055
• OSTI ID: 6816020
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 61:6; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
BORON ALLOYS
COHERENT SCATTERING
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CURIE POINT
DATA
DIFFRACTION
ERBIUM ALLOYS
EXPERIMENTAL DATA
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MAGNETIZATION
NUMERICAL DATA
ORIENTATION
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
RARE EARTH ALLOYS
SCATTERING
SPIN ORIENTATION
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
X-RAY DIFFRACTION