Kinetics of magnetoelastic twin-boundary motion in ferromagnetic shape-memory alloys

A. Pramanick; X. L. Wang; A. D. Stoica; C. Yu; Y. Ren; S. Tang; Z. Gai

doi:10.1103/PhysRevLett.112.217205

Kinetics of magnetoelastic twin-boundary motion in ferromagnetic shape-memory alloys

A. Pramanick, X. L. Wang, A. D. Stoica, C. Yu, Y. Ren, S. Tang, Z. Gai

Scanning Tunneling Microscopy Group

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15 Scopus citations

Abstract

We report the kinetics of twin-boundary motion in the ferromagnetic shape-memory alloy of Ni-Mn-Ga as measured by in situ high energy synchrotron diffraction. The temporal evolution of twin reorientation during the application of a magnetic field is described by thermally activated creep motion of twin boundaries over a distribution of energy barriers. The dynamical creep exponent μ was found to be ∼0.5, suggesting that the distribution of energy barriers is a result of short-range disorders.

Original language	English
Article number	217205
Journal	Physical Review Letters
Volume	112
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevLett.112.217205
State	Published - May 30 2014

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Funders	Funder number
Oak Ridge National Laboratory

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10.1103/PhysRevLett.112.217205

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abstract = "We report the kinetics of twin-boundary motion in the ferromagnetic shape-memory alloy of Ni-Mn-Ga as measured by in situ high energy synchrotron diffraction. The temporal evolution of twin reorientation during the application of a magnetic field is described by thermally activated creep motion of twin boundaries over a distribution of energy barriers. The dynamical creep exponent μ was found to be ∼0.5, suggesting that the distribution of energy barriers is a result of short-range disorders.",

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AU - Ren, Y.

AU - Tang, S.

AU - Gai, Z.

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AB - We report the kinetics of twin-boundary motion in the ferromagnetic shape-memory alloy of Ni-Mn-Ga as measured by in situ high energy synchrotron diffraction. The temporal evolution of twin reorientation during the application of a magnetic field is described by thermally activated creep motion of twin boundaries over a distribution of energy barriers. The dynamical creep exponent μ was found to be ∼0.5, suggesting that the distribution of energy barriers is a result of short-range disorders.

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Kinetics of magnetoelastic twin-boundary motion in ferromagnetic shape-memory alloys

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