Polarization-analysis study of the atomic and spin-pair correlations in Ni/sub 0. 76/Mn/sub 0. 24/
Neutron diffuse scattering measurements were made on single-crystal Ni/sub 0.76/Mn/sub 0.24/ to determine the atomic and spin-pair correlations in the reentrant spin-glass state. The nuclear and magnetic diffuse scattering were separated by polarization analysis at T = 10 K in a field of 8.1 kOe applied parallel to Q. The nuclear cross section shows diffuse peaks at (100) and (110) due to atomic short-range order (ASRO) with a range of about 3a/sub 0/. The ASRO parameters for this quenched alloy were determined to 16 shells; these show a preference for like even-shell and unlike odd-shell neighbors. In the experimental geometry, the magnetic cross section determines the correlations between spin components transverse to the applied field, or magnetization direction. The magnetic short-range-order parameters alternate in sign for the first four shells and then remain positive at larger distances. This unusual result corresponds to the coexistence of short-range antiferromagnetic order with both short- and long-range ferromagnetic order.
- Research Organization:
- Oak Ridge National Laboratory, Solid State Division, Oak Ridge, Tennessee 37831
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 6393861
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 36:10; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ANTIFERROMAGNETISM
COHERENT SCATTERING
CORRELATIONS
CRYSTALS
DIFFRACTION
FERROMAGNETISM
MAGNETIC FIELDS
MAGNETISM
MANGANESE ALLOYS
MONOCRYSTALS
NEUTRON DIFFRACTION
NICKEL ALLOYS
POLARIZATION
QUENCHING
SCATTERING
SPIN GLASS STATE
ULTRALOW TEMPERATURE