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arXiv · 1010.4118

Strain-driven non-collinear magnetic ordering in orthorhombic epitaxial YMnO3 thin films

X. Marti·V. Skumryev·V. Laukhin·R. Bachelet·C. Ferrater·M. V. García-Cuenca·M. Varela·F. Sánchez·J. Fontcuberta
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Abstract

We show that using epitaxial strain and chemical pressure in orthorhombic YMnO3 and Co-substituted (YMn0.95Co0.05O3) thin films, a ferromagnetic response can be gradually introduced and tuned. These results, together with the measured anisotropy of the magnetic response, indicate that the unexpected observation of ferromagnetism in orthorhombic o-RMnO3 (R= Y, Ho, Tb, etc) films originates from strain-driven breaking of the fully compensated magnetic ordering by pushing magnetic moments away from the antiferromagnetic [010] axis. We show that the resulting canting angle and the subsequent ferromagnetic response, gradually increase (up to ~ 1.2\degree) by compression of the unit cell. We will discuss the relevance of these findings, in connection to the magnetoelectric response of orthorhombic manganites.

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X. Marti, V. Skumryev, V. Laukhin, R. Bachelet, C. Ferrater, M. V. García-Cuenca, M. Varela, F. Sánchez, J. Fontcuberta. 2011-02-12. Strain-driven non-collinear magnetic ordering in orthorhombic epitaxial YMnO3 thin films. https://doi.org/10.1063/1.3514575

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