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Coupling of magnetism and structural phase transitions by interfacial strain

Published online by Cambridge University Press:  18 September 2014

Thomas Saerbeck*
Affiliation:
Department of Physics and Center for Advanced Nanoscience, University of California San Diego, La Jolla, California 92093, USA
Jose de la Venta
Affiliation:
Department of Physics, Colorado State University, Fort Collins, Colorado 80523, USA
Siming Wang
Affiliation:
Materials Science and Engineering Program, University of California San Diego, La Jolla, California 92093, USA; and Department of Physics and Center for Advanced Nanoscience, University of California San Diego, La Jolla, California 92093, USA
Juan Gabriel Ramírez
Affiliation:
Department of Physics and Center for Advanced Nanoscience, University of California San Diego, La Jolla, California 92093, USA
Mikhail Erekhinsky
Affiliation:
Department of Physics and Center for Advanced Nanoscience, University of California San Diego, La Jolla, California 92093, USA
Ilya Valmianski
Affiliation:
Department of Physics and Center for Advanced Nanoscience, University of California San Diego, La Jolla, California 92093, USA
Ivan K. Schuller
Affiliation:
Department of Physics and Center for Advanced Nanoscience, University of California San Diego, La Jolla, California 92093, USA
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Proximity effects and exchange coupling across interfaces of hybrid magnetic heterostructures present unique opportunities for functional material design. In this review, we present an overview of recent experiments on magnetic hybrid materials in which magnetism was controlled by proximity to an active material. In particular, we discuss interfacial strain coupling of ferromagnetic materials in contact with a material undergoing a structural deformation. Bilayers containing VO2 and V2O3 as active materials are shown to strongly affect the magnetization and coercivity of ferromagnetic materials due to stress anisotropy caused by a temperature-dependent structural displacement in the oxide. The possibilities of tuning the system by sample morphology and materials choice are discussed in detail. In addition, we highlight a length-scale competition between magnetic and structural domains which leads to a maximum change in the coercivity in a narrow temperature window of the vanadium oxide phase transition.

Type
Invited Feature Papers
Copyright
Copyright © Materials Research Society 2014 

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Footnotes

This paper has been selected as an Invited Feature Paper.

References

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