Emergence of ferromagnetism in antiferromagnetic TbMnO3 by epitaxial strain

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(Universitat Autònoma de Barcelona. Departament de Física)
Ferrater Martorell, Cèsar (Universitat de Barcelona. Departament de Física Aplicada i Òptica)
García-Cuenca Varona, María Victoria (Universitat de Barcelona. Departament de Física Aplicada i Òptica)
Varela Fernández, Manuel, 1956- (Universitat de Barcelona. Departament de Física Aplicada i Òptica)
Sánchez Barrera, Florencio

(Institut de Ciència de Materials de Barcelona)
Fontcuberta, Josep

(Institut de Ciència de Materials de Barcelona)
American Physical Society

Data:	2010
Resum:	We show that in oxide thin films of spiral antiferromagnetic orthorhombic TbMnO3, ferromagnetism emerges resulting from epitaxially induced strain. The unit cell volume can be tuned (contracting up to a 2%) by varying thickness and deposition conditions; it is found that the ferromagnetic response correlates with the unit cell deformation. Such effect of strain on the magnetic properties turns out to be similar to that occurring in collinear orthorhombic antiferromagnets such as YMnO3. Owing to the intimate relationship between magnetic order and ferroelectricity in TbMnO3 these results may provide a new route to induce magnetoelectric coupling and tailor their ferroelectric response.
Nota:	This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
Drets:	Tots els drets reservats.
Llengua:	Anglès
Document:	Article ; recerca ; Versió publicada
Matèria:	Materials ; Propietats magnètiques
Publicat a:	Applied physics letters, Vol. 96, Issue 22 (May 2010) , p. 222505/1-222505/3, ISSN 1077-3118

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