Shifted M-H loop in a phase-decomposed Fe-12%Mn alloy

Author

Jin, S. ; Tiefel, T.H. ; Gyorgy, E.M. ; Chen, L.H. ; Waszczak, J.V. ; Kammlott, G.W.

Author_Institution

AT&T Bell Lab., Murray Hill, NJ, USA

Volume

28

Issue

5

fYear

1992

fDate

9/1/1992 12:00:00 AM

Firstpage

3192

Lastpage

3194

Abstract

The authors have successfully induced a shifted M-H loop at room temperature in an Fe-12%Mn alloy by phase decomposition into a submicron two-phase structure and uniaxial deformation to elongate the interfaces parallel to the field direction. The remanent induction of the material after magnetization was utilized as an internal field, thus making the field cooling process unnecessary. The shift [H_c(+)=84 Oe (6.67 kA/m), H_c(-)=94 Oe (7.46 kA/m)] was unidirectional rather than uniaxial. The behavior is attributed to the exchange interaction at the interface between the spins of the Fe-rich ferromagnetic phase and those of the antiferromagnetic Mn-rich phase with its Neel temperature above room temperature

Keywords

antiferromagnetic properties of substances; coercive force; decomposition; exchange interactions (electron); ferromagnetic properties of substances; iron alloys; magnetic hysteresis; manganese alloys; remanence; Fe-Mn alloy; Neel temperature; antiferromagnetic phase; coercivity shift; exchange interaction; ferromagnetic phase; interface elongation; magnetization; phase decomposition; remanent induction; room temperature; shifted hysteresis loop; submicron two-phase structure; uniaxial deformation; Anisotropic magnetoresistance; Antiferromagnetic materials; Cooling; Cryogenics; Elementary particle exchange interactions; Magnetic hysteresis; Magnetic materials; Magnetization; Manganese alloys; Temperature;

fLanguage

English

Journal_Title

Magnetics, IEEE Transactions on

Publisher

ieee

ISSN

0018-9464

Type

jour

DOI

10.1109/20.179755

Filename

179755