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Strain-modulated antiferromagnetic spin orientation and exchange coupling in Fe/CoO(001)

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Hu,  Z.
Zhiwei Hu, Physics of Correlated Matter, Max Planck Institute for Chemical Physics of Solids, Max Planck Society;

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Citation

Zhu, J., Li, Q., Li, J. X., Ding, Z., Hua, C. Y., Huang, M. J., et al. (2014). Strain-modulated antiferromagnetic spin orientation and exchange coupling in Fe/CoO(001). Journal of Applied Physics, 115: 193903, pp. 1-7. doi:10.1063/1.4876907.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0019-DB2D-7
Abstract
The effect of CoO spin orientation on exchange coupling was investigated in single-crystalline Fe/CoO/MnO/MgO(001) systems. An antiferromagnetic CoO spin reorientation transition from the in-plane direction to the out-of-plane direction was found to be associated with the in-plane strain transition in CoO film from compression to expansion. The induced uniaxial anisotropies by exchange coupling at the Fe/CoO interface are significantly stronger for the in-plane CoO spin orientation than for the out-of-plane CoO spin orientation. Our study provides a way to modify the exchange coupling in the ferromagnetic (FM)/antiferromagnetic (AFM) bilayer by modulating the strain in the AFM film.