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Journal article

Magnetostriction and Magnetic Heterogeneities in Iron-Gallium

By Laver, Mark1,2,3; Mudivarthi, C.4; Cullen, J.R.4; Flatau, A.B.4; Chen, W.-C.5; Watson, S.M.5; Wuttig, M.4

From

Nano-Microstructures in Materials, Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark1

Materials Research Division, Risø National Laboratory for Sustainable Energy, Technical University of Denmark2

Risø National Laboratory for Sustainable Energy, Technical University of Denmark3

University of Maryland, College Park4

National Institute of Standards and Technology5

Iron-gallium alloys Fe1-xGax exhibit an exceptional increase in magnetostriction with gallium content. We present small-angle neutron scattering investigations on a Fe0.81Ga0.19 single crystal. We uncover heterogeneities with an average spacing of 15 nm and with magnetizations distinct from the matrix.

The moments in and around the heterogeneities are observed to reorient with an applied magnetic field or mechanical strain. We discuss the possible roles played by nanoscale magnetic heterogeneities in the mechanism for magnetostriction in this material. © 2010 The American Physical Society

Language: English
Year: 2010
Pages: 027202
ISSN: 10797114 and 00319007
Types: Journal article
DOI: 10.1103/PhysRevLett.105.027202
Keywords

Materialer og energilagring Materials and energy storage Superconducting materials Superledende materialer

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