Temperature dependence of hyperfine magnetic fields in Fe-Co alloys

Journal Article · Mon Oct 01 04:00:00 EDT 1990 · Physical Review, B: Condensed Matter; (USA)

DOI:https://doi.org/10.1103/PhysRevB.42.6694· OSTI ID:6017324

Hamdeh, H H; Okamoto, J; Fultz, B ^[1]

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1. Division of Engineering and Applied Science, California Institute of Technology, Pasadena, CA (USA)

A Moessbauer spectrometry study of bcc Fe-Co alloys was performed to measure the {sup 57}Fe hyperfine-field parameters from 77 to 900 K. The temperature dependence of the {sup 57}Fe hyperfine magnetic field in Fe-Co alloys was similar, although not identical, to that of {sup 57}Fe in pure Fe. These results are understood if the alignment of magnetic moments at Fe atoms is only slightly more temperature dependent than at Co atoms. This situation for Fe-Co is significantly different from that of Fe-Ni alloys, indicating that the interatomic exchange interactions in Fe-Co alloys are stronger than in Fe-Ni.

• DOE Contract Number: FG03-86ER45270
• OSTI ID: 6017324
• Journal Information: Physical Review, B: Condensed Matter; (USA), Journal Name: Physical Review, B: Condensed Matter; (USA) Vol. 42:10; ISSN 0163-1829; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
COBALT ALLOYS
EVEN-ODD NUCLEI
HIGH TEMPERATURE
HYPERFINE STRUCTURE
INTERMEDIATE MASS NUCLEI
IRON 57
IRON ALLOYS
IRON BASE ALLOYS
IRON ISOTOPES
ISOTOPES
LOW TEMPERATURE
MAGNETIC PROPERTIES
MEDIUM TEMPERATURE
MOESSBAUER EFFECT
NUCLEI
PHYSICAL PROPERTIES
STABLE ISOTOPES
TEMPERATURE DEPENDENCE