Epitaxial-strain effects on electronic structure and magnetic properties of hexagonal YMnO3 thin films studied by femtosecond spectroscopy

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

*此作品的通信作者

研究成果: Article同行評審

11 引文 斯高帕斯(Scopus)

摘要

In this paper, (001)-oriented hexagonal YMnO3 (h-YMO) thin films with various nominal strain states were deposited on MgO(100), MgO(111), and YSZ(111) substrates by pulsed laser deposition. The in-plane orientation alignment and substrate-induced epitaxial strain between the h-YMO films and substrates are examined by X-ray diffraction (XRD) θ-2θ, Φ, and ω scans. The effects of epitaxial strain on the on-site Mn d-d transition energy Edd (T), and the Néel temperature (TN) in these thin films are investigated by wavelength-tunable ultrafast pump-probe techniques. We find that the changes of Edd (T) and TN depend on the type and magnitude of the epitaxial strain. The possible mechanisms for the observed strain effect on the electronic structure and associated magnetism are discussed.

原文English
頁(從 - 到)801-807
頁數7
期刊Journal of Superconductivity and Novel Magnetism
26
發行號4
DOIs
出版狀態Published - 1 4月 2013

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