Anisotropy induced large exchange bias behavior in ball milled Ni-Co-Mn-Sb alloys

Journal Article · Mon Jun 06 00:00:00 EDT 2011 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.3597305· OSTI ID:21518475

Nayak, Ajaya K; Sahoo, Roshnee; Suresh, K G ^[1]; Nigam, A K ^[2]; Chen, X; Ramanujan, R V ^[3]

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1. Department of Physics, Indian Institute of Technology Bombay, Mumbai 400076 (India)
2. Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai 400005 (India)
3. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798 (Singapore)

We report the effect of decrease in the grain size on the structural, magnetic and exchange bias (EB) behavior in ball milled Ni{sub 50-x}Co{sub x}Mn{sub 38}Sb{sub 12} (x=0 and 5) Heusler alloys. The existence of a wide range of grain sizes in the ball milled samples results in dramatic changes in the structural and magnetic properties. For x=0, a large EB field of 3.2 kOe is observed in the ball milled sample, compared to a value of 245 Oe of the bulk sample. This increase is attributed to the enhanced exchange coupling between the soft and hard magnetic particles.

• OSTI ID: 21518475
• Journal Information: Applied Physics Letters, Vol. 98, Issue 23; Other Information: DOI: 10.1063/1.3597305; (c) 2011 American Institute of Physics; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ANISOTROPY
ANTIMONY ALLOYS
COBALT ALLOYS
COERCIVE FORCE
COUPLING
ELECTRONS
EXCHANGE INTERACTIONS
FERROMAGNETIC MATERIALS
GRAIN SIZE
HEUSLER ALLOYS
MAGNETIC PROPERTIES
MANGANESE ALLOYS
MILLING
NICKEL ALLOYS
PERMANENT MAGNETS
SHAPE MEMORY EFFECT
ALLOYS
ALUMINIUM ALLOYS
COPPER ALLOYS
COPPER BASE ALLOYS
CORROSION RESISTANT ALLOYS
ELEMENTARY PARTICLES
EQUIPMENT
FERMIONS
INTERACTIONS
LEPTONS
MACHINING
MAGNETIC MATERIALS
MAGNETS
MATERIALS
MICROSTRUCTURE
PHYSICAL PROPERTIES
SIZE
TRANSITION ELEMENT ALLOYS