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Lamirand AD, Soares MM, De Santis M, et al. Strain driven monoclinic distortion of ultrathin CoO films in the exchange-coupled CoO/FePt/Pt(0 0 1) system. J Phys Condens Matter. 2015;27(8):085001doi: 10.1088/0953-8984/27/8/085001.
Lamirand, A. D., Soares, M. M., De Santis, M., Ramos, A. Y., Grenier, S., & Tolentino, H. C. (2015). Strain driven monoclinic distortion of ultrathin CoO films in the exchange-coupled CoO/FePt/Pt(0 0 1) system. Journal of physics. Condensed matter : an Institute of Physics journal, 27(8), 085001. https://doi.org/10.1088/0953-8984/27/8/085001
Lamirand, Anne D, et al. "Strain driven monoclinic distortion of ultrathin CoO films in the exchange-coupled CoO/FePt/Pt(0 0 1) system." Journal of physics. Condensed matter : an Institute of Physics journal vol. 27,8 (2015): 085001. doi: https://doi.org/10.1088/0953-8984/27/8/085001
Lamirand AD, Soares MM, De Santis M, Ramos AY, Grenier S, Tolentino HC. Strain driven monoclinic distortion of ultrathin CoO films in the exchange-coupled CoO/FePt/Pt(0 0 1) system. J Phys Condens Matter. 2015 Mar 04;27(8):085001. doi: 10.1088/0953-8984/27/8/085001. Epub 2015 Jan 21. PMID: 25604708.
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J Phys Condens Matter. 2015 Mar 04;27(8):085001. doi: 10.1088/0953-8984/27/8/085001. Epub 2015 Jan 21.

Strain driven monoclinic distortion of ultrathin CoO films in the exchange-coupled CoO/FePt/Pt(0 0 1) system.

Journal of physics. Condensed matter : an Institute of Physics journal

Anne D Lamirand, Márcio M Soares, Maurizio De Santis, Aline Y Ramos, Stéphane Grenier, Hélio C N Tolentino

Affiliations

  1. Université Grenoble Alpes, Institut Néel, F-38042 Grenoble, France. CNRS, Institut Néel, F-38042 Grenoble, France.

PMID: 25604708 DOI: 10.1088/0953-8984/27/8/085001

Abstract

The structure and strain of ultrathin CoO films grown on a Pt(0 0 1) substrate and on a ferromagnetic FePt pseudomorphic layer on Pt(0 0 1) have been determined with in situ and real time surface x-ray diffraction. The films grow epitaxially on both surfaces with an in-plane hexagonal pattern that yields a pseudo-cubic CoO(1 1 1) surface. A refined x-ray diffraction analysis reveals a slight monoclinic distortion at RT induced by the anisotropic stress at the interface. The tetragonal contribution to the distortion results in a ratio [Formula: see text], opposite to that found in the low temperature bulk CoO phase. This distortion leads to a stable Co(2+) spin configuration within the plane of the film.

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