Probing magnetoelastic effects of ultrathin antiferromagnets via magnetic domain imaging in ferromagnetic-antiferromagnetic bilayers

Bo Yao Wang; Jhen Yong Hong; Nae Yeou Jih; Kui Hon Ou Yang; Li Ren Chen; Hong Ji Lin; Yuet Loy Chan; Der Hsin Wei; Minn Tsong Lin

doi:10.1103/PhysRevB.90.224424

Probing magnetoelastic effects of ultrathin antiferromagnets via magnetic domain imaging in ferromagnetic-antiferromagnetic bilayers

Bo Yao Wang, Jhen Yong Hong, Nae Yeou Jih, Kui Hon Ou Yang, Li Ren Chen, Hong Ji Lin, Yuet Loy Chan, Der Hsin Wei, Minn Tsong Lin

Department of Physics

Research output: Contribution to journal › Article › peer-review

5 Citations (Scopus)

Abstract

We report an experimental investigation of the magnetoelastic effects of ultrathin antiferromagnets, performed by comparing the characteristic behavior of the induced spin-reorientation transition (SRT) of Co films in two types of epitaxially grown bilayers: face-centered-cubic (fcc)-like Mn/Co (fcc-Mn: a=3.75Å,c=3.76Å) and face-centered-tetragonal (fct)-Mn (a=3.61Å,c=3.78Å). Magnetic hysteresis loops and magnetic domain images indicate that both fcc-Mn and fct-Mn films can produce a (110) to (100) SRT in adjacent Co films when the thickness of the Mn layer is greater than a temperature-dependent critical value. Detailed analysis of the critical thickness of Mn films and the evolution of the Co domain structure upon SRT indicate that the fct-Mn film had a higher antiferromagnetic ordering temperature and stronger lateral Mn-Mn exchange coupling compared with the fcc-Mn film. The enhanced long-range antiferromagnetic ordering emerging concurrently with the in-plane lattice variation of the fcc-like Mn film in Mn/Co bilayers clearly showed the magnetoelastic effect of ultrathin antiferromagnets.

Original language	English
Article number	224424
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	90
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.90.224424
Publication status	Published - 2014 Dec 29

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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Wang, B. Y., Hong, J. Y., Jih, N. Y., Ou Yang, K. H., Chen, L. R., Lin, H. J., Chan, Y. L., Wei, D. H., & Lin, M. T. (2014). Probing magnetoelastic effects of ultrathin antiferromagnets via magnetic domain imaging in ferromagnetic-antiferromagnetic bilayers. Physical Review B - Condensed Matter and Materials Physics, 90(22), [224424]. https://doi.org/10.1103/PhysRevB.90.224424

Wang, Bo Yao ; Hong, Jhen Yong ; Jih, Nae Yeou ; Ou Yang, Kui Hon ; Chen, Li Ren ; Lin, Hong Ji ; Chan, Yuet Loy ; Wei, Der Hsin ; Lin, Minn Tsong. / Probing magnetoelastic effects of ultrathin antiferromagnets via magnetic domain imaging in ferromagnetic-antiferromagnetic bilayers. In: Physical Review B - Condensed Matter and Materials Physics. 2014 ; Vol. 90, No. 22.

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title = "Probing magnetoelastic effects of ultrathin antiferromagnets via magnetic domain imaging in ferromagnetic-antiferromagnetic bilayers",

abstract = "We report an experimental investigation of the magnetoelastic effects of ultrathin antiferromagnets, performed by comparing the characteristic behavior of the induced spin-reorientation transition (SRT) of Co films in two types of epitaxially grown bilayers: face-centered-cubic (fcc)-like Mn/Co (fcc-Mn: a=3.75{\AA},c=3.76{\AA}) and face-centered-tetragonal (fct)-Mn (a=3.61{\AA},c=3.78{\AA}). Magnetic hysteresis loops and magnetic domain images indicate that both fcc-Mn and fct-Mn films can produce a (110) to (100) SRT in adjacent Co films when the thickness of the Mn layer is greater than a temperature-dependent critical value. Detailed analysis of the critical thickness of Mn films and the evolution of the Co domain structure upon SRT indicate that the fct-Mn film had a higher antiferromagnetic ordering temperature and stronger lateral Mn-Mn exchange coupling compared with the fcc-Mn film. The enhanced long-range antiferromagnetic ordering emerging concurrently with the in-plane lattice variation of the fcc-like Mn film in Mn/Co bilayers clearly showed the magnetoelastic effect of ultrathin antiferromagnets.",

author = "Wang, {Bo Yao} and Hong, {Jhen Yong} and Jih, {Nae Yeou} and {Ou Yang}, {Kui Hon} and Chen, {Li Ren} and Lin, {Hong Ji} and Chan, {Yuet Loy} and Wei, {Der Hsin} and Lin, {Minn Tsong}",

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Probing magnetoelastic effects of ultrathin antiferromagnets via magnetic domain imaging in ferromagnetic-antiferromagnetic bilayers. / Wang, Bo Yao; Hong, Jhen Yong; Jih, Nae Yeou; Ou Yang, Kui Hon; Chen, Li Ren; Lin, Hong Ji; Chan, Yuet Loy; Wei, Der Hsin; Lin, Minn Tsong.

In: Physical Review B - Condensed Matter and Materials Physics, Vol. 90, No. 22, 224424, 29.12.2014.

Research output: Contribution to journal › Article › peer-review

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AU - Wei, Der Hsin

AU - Lin, Minn Tsong

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