Interrelation of epitaxial strain and oxygen deficiency in La0.7Ca0.3Mn3-δ thin films

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:378

Article

Kawashima, K.¹  Logvenov, G.¹  Christiani, G.¹  Habermeier, H. -U.¹ 

[1] Max Planck Inst Solid State Res, D-50569 Stuttgart, Germany

关键词: La0.7Ca0.3Mn3-delta thin films;    Pulsed Laser Deposition;    Epitaxial Strain;    Oxygen deficiencies in La0.7Ca0.3Mn3-delta thin films;   

DOI  :  10.1016/j.jmmm.2014.11.055

来源: Elsevier

【 摘 要 】

The interrelation between the epitaxial strain and oxygen deficiency in La0.7Ca0.3Mn3-delta thin films was studied in terms of structural and functional properties. The films with a thickness of 1000 A were prepared using a PLD system equipped with a RHEED facility and a pyrometric film temperature control. The epitaxial strain and the oxygen deficiency in the samples were systematically modified using three different substrates: SrTiO3, (LaAlO3)(0.3)-(Sr2AlTaO6)(0.7) and LaSrAlO4, and four different oxygen pressures during film growth ranging from 0.27 mbar to 0.1 mbar It could be demonstrated that the oxygen incorporation depends on the epitaxial strain: oxygen vacancies were induced to accommodate tensile strain whereas the compressive strain suppressed the generation of oxygen vacancies. (C) 2014 Elsevier B.V. All rights reserved.

【 授权许可】

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