HoFe/sub 4/Al/sub 8/: An unusual spin glass

Journal Article · Sat Jul 01 00:00:00 EDT 1989 · Phys. Rev. B: Condens. Matter; (United States)

DOI:https://doi.org/10.1103/PhysRevB.40.745· OSTI ID:5953550

Gal, J; Yaar, I; Arbaboff, E; Etedgi, H

We report on the spin-glass behavior ofHoFe/sub 4/Al/sub 8/. Irreversible and time-dependent effectsin the intensities of magnetic Bragg scattering derived from neutrondiffraction reveal this behavior pronouncedly below/ital T//sub SG/=180 K. Further evidence comes from the dcisothermal and thermoremanent magnetization. The M/umlt o/ssbauer/sup 57/Fe spectra show a sudden onset of magnetic hyperfinesplitting below /ital T//sub SG/ and a flat temperature dependencetogether with irreversible effects under applied magnetic fields. A transitiontemperature from aligned to random spin-glass states /ital T//sub OG/, isreported. /ital T//sub OG/=40--70 K, depending on the appliedmagnetic field. Most unusual is the lack (or extremely broad) of a cusp in theac susceptibility in the vicinity of /ital T//sub SG/.

• Research Organization: Department of Nuclear Engineering, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel(IL); Nuclear Research Centergev (NRCN), P.O. Box 9001, 84190 Beer-Sheva, Israel Physik-Department (E15), Technische Universitat Munchen, D-8046 Garching bei Munchen, Federal Republic of Germany; Department of Nuclear Engineering, Ben-Gurion University of the Negev, 84105 Beer-Sheva, Israel; Nuclear Research CenterNegev (NRCN), P.O. Box 9001, 84190 Beer-Sheva, Israel
• OSTI ID: 5953550
• Journal Information: Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 40:1; ISSN PRBMD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ALUMINIUM ALLOYS
BRAGG REFLECTION
COHERENT SCATTERING
DIFFRACTION
HOLMIUM ALLOYS
IRON ALLOYS
IRREVERSIBLE PROCESSES
LOW TEMPERATURE
MAGNETIC FIELDS
MAGNETIZATION
MOESSBAUER EFFECT
NEUTRON DIFFRACTION
RARE EARTH ALLOYS
REFLECTION
SCATTERING
SPIN GLASS STATE
TIME DEPENDENCE