Localized magnetism in YMn sub 2 below the Neel temperature

Journal Article · Fri Dec 01 04:00:00 EST 1989 · Journal of Low Temperature Physics; (USA)

DOI:https://doi.org/10.1007/BF00682755· OSTI ID:6003533

Ali, N; Labroo, S ^[1]

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1. Southern Illinois Univ., Carbondale (USA)

The authors have measured magnetic susceptibility, thermal expansion, electrical resistivity, and magnetoresistance of the intermetallic compound YMn{sub 2}. YMn{sub 2} orders antiferromagnetically below T{sub N} {approx equal} 110 K. There is a large thermal hysteresis such that the ordering temperature is T{sub N} = 86 K on cooling and T{sub N} = 116 K on warming. This is a first-order phase transition from the paramagnetic to antiferromagnetic phase. Their electrical resistivity and magnetoresistance measurements in the ordered state show a localized magnetic moment for Mn atoms in YMn{sub 2} below T{sub N}. The Mn moments collapse at T{sub N} which is reflected in the sharp decrease in the thermal expansivity at T{sub N}. Above T{sub N} the Mn moment gradually recovers with increasing temperature which is reflected as an increase in {chi} with increasing temperature in the paramagnetic state. This behavior at T > T{sub N} could be described by weak itinerant electron magnetism.

• OSTI ID: 6003533
• Journal Information: Journal of Low Temperature Physics; (USA), Journal Name: Journal of Low Temperature Physics; (USA) Vol. 77:5-6; ISSN 0022-2291; ISSN JLTPA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360104* -- Metals & Alloys-- Physical Properties
ALLOYS
ANTIFERROMAGNETISM
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CUBIC LATTICES
ELECTRIC CONDUCTIVITY
ELECTRICAL PROPERTIES
EXPANSION
INTERMETALLIC COMPOUNDS
LAVES PHASES
LOW TEMPERATURE
MAGNETIC PROPERTIES
MAGNETIC SUSCEPTIBILITY
MAGNETISM
MAGNETIZATION
MAGNETORESISTANCE
MANGANESE ALLOYS
NEEL TEMPERATURE
ORDER PARAMETERS
PARAMAGNETISM
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
TEMPERATURE DEPENDENCE
THERMAL EXPANSION
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE
YTTRIUM ALLOYS