Orbital ordering and enhanced magnetic frustration of strained thin films

C.-H. Yang; T. Y. Koo; S.-H. Lee; C. Song; K.-B. Lee; Y. H. Jeong

doi:10.1209/epl/i2005-10540-1

All issues

Volume 74 / No 2 (April 2006)

Europhys. Lett., 74 2 (2006) 348-354

Abstract

Issue		Europhys. Lett. Volume 74, Number 2, April 2006


Page(s)		348 - 354
Section		Condensed matter: electronic structure, electrical, magnetic, and optical properties
DOI		https://doi.org/10.1209/epl/i2005-10540-1
Published online		17 March 2006

Europhys. Lett., 74 (2), pp. 348-354 (2006)

Orbital ordering and enhanced magnetic frustration of strained $\chem{BiMnO_3}$ thin films

C.-H. Yang¹, T. Y. Koo², S.-H. Lee¹, C. Song¹, K.-B. Lee¹ and Y. H. Jeong¹

¹ Department of Physics & Electron Spin Science Center, Pohang University of Science and Technology - Pohang, 790-784, South Korea
² Pohang Accelerator Laboratory, Pohang University of Science and Technology Pohang, 790-784, South Korea

Received: 14 November 2005
Accepted: 28 February 2006

Abstract

Epitaxial thin films of multiferroic perovskite $\chem{BiMnO_3}$ were synthesized on $\chem{SrTiO_3}$ substrates, and orbital ordering and magnetic properties of the thin films were investigated. The ordering of the $\chem{Mn^{3+}}$ e_g orbitals at a wave vector $(\frac{1}{4}\frac{1}{4}\frac{1}{4})$ was detected by Mn K-edge resonant X-ray scattering. This peculiar orbital order inherently contains magnetic frustration. While bulk $\chem{BiMnO_3}$ is known to exhibit simple ferromagnetism, the frustration enhanced by in-plane compressive strains in the films brings about cluster-glass-like properties.

PACS: 75.50.Dd – Nonmetallic ferromagnetic materials / 75.80.+q – Magnetomechanical and magnetoelectric effects, magnetostriction / 61.10.Eq – X-ray scattering (including small-angle scattering)

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