Coexistence of antiferromagnetism and spin-glass ordering in the Ising system Fe/sub 0. 55/Mg/sub 0. 45/Cl/sub 2/

Journal Article · Mon Apr 15 04:00:00 EST 1985 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.335080· OSTI ID:5896265

Wong, P; Yoshizawa, H; Shapiro, S M

Fe/sub 1-x/Mg/sub x/Cl/sub 2/ is a diluted Ising antiferromagnet with competing first- and second-neighbor exchange interactions. For xroughly-equal45, the system undergoes a Neel transition at T/sub N/ roughly-equal7.4 K and a reentrant spin-glass transition at T/sub sg/ roughly-equal3.0 K. From neutron scattering experiments we find that (i) the antiferromagnetic Bragg peak persists down to 1.2 K, well below T/sub sg/; and (ii) the diffuse scattering becomes temperature independent below about 6.0 K, with the correlation length frozen at about 2.8 lattice spacings. These results suggest that long-range antiferromagnetic order and spin-glass-like short-range order coexist. Such a behavior is predicted by the infinite-range model for spin glasses with strong uniaxial anisotropy.

• Research Organization: Schlumberger-Doll Research, Old Quarry Road, Ridgefield, Connecticut 06877-4108
• OSTI ID: 5896265
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 57:8; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360104* -- Metals & Alloys-- Physical Properties
ALKALINE EARTH METAL COMPOUNDS
ANISOTROPY
ANTIFERROMAGNETISM
BRAGG REFLECTION
CHLORINE COMPOUNDS
COHERENT SCATTERING
CRYSTAL MODELS
DIFFRACTION
EXCHANGE INTERACTIONS
HALOGEN COMPOUNDS
INTERACTIONS
IRON COMPOUNDS
ISING MODEL
MAGNESIUM COMPOUNDS
MAGNETISM
MATHEMATICAL MODELS
NEEL TEMPERATURE
NEUTRON DIFFRACTION
PHYSICAL PROPERTIES
REFLECTION
SCATTERING
SPIN GLASS STATE
THERMODYNAMIC PROPERTIES
TRANSITION ELEMENT COMPOUNDS
TRANSITION TEMPERATURE