Neutron scattering study of the itinerant-electron magnet YMn/sub 2/
Neutron scattering with polarized beam analysis has been used to study the magnetic properties of the antiferromagnet YMn/sub 2/ (T/sub N/approx. =100 K). Previous susceptibility, NMR relaxation, and preliminary neutron measurements indicate a transition from a local-moment magnet in the ordered phase to an itinerant-electron magnet above T/sub N/. We present a detailed analysis of magnetic-scattering data measured for temperatures ranging from T = 10 K to T = 600 K. The analysis includes energy integration of the paramagnetic response, simple model calculations of the measured powder average, and absolute calibration of the cross sections. The amplitude of the local magnetic moment per Mn atom is extracted and shown to drop by more than )similarreverse arrowto)30% at T/sub N/ and to slowly increase again with increasing temperature, and up to 6T/sub N/ strong antiferromagnetic correlations are found to persist. This behavior is consistent with recent theories for itinerant-electron magnetism
- Research Organization:
- Physics Department, Brookhaven National Laboratory, Upton, New York 11973-5000
- OSTI ID:
- 5356697
- Journal Information:
- Phys. Rev. B: Condens. Matter; (United States), Journal Name: Phys. Rev. B: Condens. Matter; (United States) Vol. 37:7; ISSN PRBMD
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
360104* -- Metals & Alloys-- Physical Properties
ALLOY SYSTEMS
ALLOYS
ANTIFERROMAGNETIC MATERIALS
BEAMS
BINARY ALLOY SYSTEMS
COHERENT SCATTERING
DIFFRACTION
MAGNETIC MATERIALS
MAGNETIC MOMENTS
MAGNETIC PROPERTIES
MANGANESE ALLOYS
MATERIALS
NEEL TEMPERATURE
NEUTRON DIFFRACTION
PHYSICAL PROPERTIES
POLARIZED BEAMS
SCATTERING
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
YTTRIUM ALLOYS