Effects of compressive epitaxial strain in the b-axis on the magnetization response of orthorhombic HoMnO3 thin films

T. H. Lin, C. C. Hsieh, H. C. Shih, Chih-Wei Luo, T. M. Uen, Kaung-Hsiung Wu, Jiunn-Yuan Lin, C. H. Hsu, Jenh-Yih Juang

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3 Scopus citations

Abstract

The orthorhombic phase HoMnO3 (o-HMO in Pbnm symmetry setting) thin films were prepared on LaAlO3(110) (LAO(110)) substrates by pulsed laser deposition. While for films grown on LAO(110) substrates, the compressive strain along the b-axis was resulted from the tensile strain in the a-c plane. The films provide the opportunity of investigating the effects of strain, hence lattice elasticity, on the physical properties of this material. For o-HMO films an antiferromagnetic ordering with TN∼42 K, irrespective to the direction of applied field was clearly observed. However, an additional magnetic ordering occurring around 26.4 K was observed when the field was applied along the c-axis of o-HMO. This transition, however, was absent when the field was applied along a- and b-axis. These results indicate that the second magnetic ordering observed along the c-axis could be more relevant to the Mn moments lying along the partially strained b direction of the o-HMO which has been theoretically expected to result in incommensurate- commensurate lock-in transition.

Original languageAmerican English
Article number042114
Pages (from-to)1-4
Number of pages4
JournalJournal of Physics: Conference Series
Volume150
Issue number4
DOIs
StatePublished - 6 Aug 2009

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