Evidence for preferentail rearrangements of mertensite variants by magnetic field in antiferromagnetic CoO crystal.

Journal Article · Thu Jan 01 00:00:00 EST 2009 · Appl. Phys. Lett.

DOI:https://doi.org/10.1063/1.3195730· OSTI ID:1024593

Nie, Z H; Ren, Y; Terai, T; Wang, Y D; Brown, D E; Kekeshita, T ^[1]

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1. X-Ray Science Division

The synchrotron high-energy x-ray diffraction provides the direct crystallographic evidence for the magnetic-field-driven preferential rearrangements of martensite multivariants in antiferromagnetic CoO crystal. When a magnetic field was incrementally applied up to 6 T on the CoO single crystal cooled below the Neel temperature, the martensite variants with the magnetization easy-axis parallel to the magnetic field direction ({rvec H}) were consumed, while the variants with magnetic moments perpendicular to {rvec H} were enhanced. The microscopic origin for the observation is discussed, which provides important information for understanding the magnetic-field-driven strain observed in the antiferromagnetic alloys, with a selection principle on martensite variants different from that found in the ferromagnetic shape memory alloys.

• Research Organization: Argonne National Lab. (ANL), Argonne, IL (United States)
• Sponsoring Organization: USDOE Office of Science (SC); National Natural Science Foundation of China (NNSFC)
• DOE Contract Number: DE-AC02-06CH11357
• OSTI ID: 1024593
• Report Number(s): ANL/XSD/JA-64981; TRN: US201119%%486
• Journal Information: Appl. Phys. Lett., Vol. 95, Issue 5 ; 2009
• Country of Publication: United States
• Language: ENGLISH

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ALLOYS
MAGNETIC FIELDS
MAGNETIC MOMENTS
MAGNETIZATION
MARTENSITE
MONOCRYSTALS
ORIGIN
SHAPE
STRAINS
SYNCHROTRONS
X-RAY DIFFRACTION