Exchange bias in bulk Ni–Mn–In-based Heusler alloys

The crystal structure and exchange bias of the bulk Heusler alloys Ni 50Mn 50− x In x with 14.5⩽ x⩽15.2 have been investigated using X-ray diffraction and magnetization measurements, respectively. Magnetic measurements were performed with SQUID magnetometry after samples were zero-field cooled and f...

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Bibliographic Details
Published in:Journal of magnetism and magnetic materials 2009-04, Vol.321 (8), p.963-965
Main Authors: Pathak, Arjun Kumar, Khan, Mahmud, Gautam, Bhoj Raj, Stadler, Shane, Dubenko, Igor, Ali, Naushad
Format: Article
Language:English
Subjects:
Condensed matter: electronic structure, electrical, magnetic, and optical properties
Domain effects, magnetization curves, and hysteresis
Exact sciences and technology
Exchange bias
First-order phase transition
Heusler alloys
Magnetic properties
Magnetic properties and materials
Magnetization curves, magnetization reversal, hysteresis, barkhausen and related effects
Physics
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Summary:The crystal structure and exchange bias of the bulk Heusler alloys Ni 50Mn 50− x In x with 14.5⩽ x⩽15.2 have been investigated using X-ray diffraction and magnetization measurements, respectively. Magnetic measurements were performed with SQUID magnetometry after samples were zero-field cooled and field cooled (FC) in positive magnetic fields up to H=50 kOe, from a temperature T=380 K. Three temperatures of the phase transitions, T 1< T M< T C, and a shift of the FC (50 kOe) magnetic hysteresis loops up to 120 Oe at 5 K have been detected for all samples. The exchange bias field ( H E) was almost constant for intermediate In concentrations 14.8< x
ISSN:0304-8853
DOI:10.1016/j.jmmm.2008.03.008