Epitaxial growth and magnetic properties of Sr2CrReO6Sr2CrReO6 thin films

The double perovskite Sr2CrReO6Sr2CrReO6 is an interesting material for spintronics, showing ferrimagnetism up to 635 K with a predicted high spin polarization of ≈86%≈86%. We fabricated Sr2CrReO6Sr2CrReO6 epitaxial films by pulsed laser deposition on (0 0 1)-oriented SrTiO3SrTiO3 substrates. Phase-pure films with optimum crystallographic and magnetic properties were obtained by growing at a substrate temperature of 700∘C in pure O2O2 of 6.6×10-4mbar. The films are cc-axis oriented, coherently strained, and show less than 20% anti-site defects. The magnetization curves reveal high saturation magnetization of 0.8μB0.8μB/formula unit and high coercivity of 1.1 T, as well as a strong magnetic anisotropy.

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