Epitaxial growth and magnetic properties of Sr2CrReO6 thin films

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS

卷:321

Article

Gepraegs, S.¹  Czeschka, F. D.¹  Opel, M.¹  Goennenwein, S. T. B.¹  Yu, W.²  Mader, W.²  Gross, R.^1,3 

[1] Bayer Akad Wissensch, Walther Meissner Inst, D-85748 Garching, Germany

[2] Univ Bonn, Inst Anorgan Chem, D-53117 Bonn, Germany

[3] Tech Univ Munich, Dept Phys, D-85748 Garching, Germany

关键词: Double perovskity;    Magnetic properties of thin film;    Laser deposition;    Magnetoelectronics;    Spintronics;   

DOI  :  10.1016/j.jmmm.2008.12.029

来源: Elsevier

【 摘 要 】

The double perovskite Sr2CrReO6 is an interesting material for spintronics, showing ferrimagnetism up to 635 K with a predicted high spin polarization of approximate to 86%. We fabricated Sr2CrReO6 epitaxial films by pulsed laser deposition on (0 0 1)-oriented SrTiO3 substrates. Phase-pure films with optimum crystallographic and magnetic properties were obtained by growing at a substrate temperature of 700 degrees C in pure O-2 of 6:6 x 10(-4) mbar. The films are c-axis oriented, coherently strained, and show less than 20% anti-site defects. The magnetization curves reveal high saturation magnetization of 0:8 mu B/formula unit and high coercivity of 1.1 T, as well as a strong magnetic anisotropy. (C) 2009 Elsevier B. V. All rights reserved.

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