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Magnetic and electronic properties of B-site-ordered double-perovskite oxide La$$_{2}$$CrMnO$$_{6}$$ thin films

Yoshimatsu, Kohei*; Ishimaru, Junya*; Watarai, Keisuke*; Yamamoto, Kohei*; Hirata, Yasuyuki*; Wadachi, Hiroki*; Takeda, Yukiharu; Horiba, Koji*; Kumigashira, Hiroshi*; Sakata, Osami*; Otomo, Akira*

We report on magnetic and electronic properties of the B-site-ordered double-perovskite La$$_{2}$$CrMnO$$_{6}$$ films grown by pulsed-laser deposition. The magnetic-field dependence of magnetization curves showed hysteresis at low temperatures regardless of the degree of Cr/Mn order and the saturation magnetization became smaller for the higher-Cr/Mn-ordered film. The X-ray absorption spectroscopy and X-ray magnetic circular dichroism measurements suggested antiferromagnetic coupling between Cr$$^{3+}$$ and Mn$$^{3+}$$ ions, resulting in ferrimagnetism of the B-site-ordered double-perovskite La$$_{2}$$CrMnO$$_{6}$$. A band structure was established by combining these results together with the synchrotron-radiation photoemission and optical spectra. We discuss the magnetic states among the $$B$$-site-ordered La$$_{2}$$$$B'$$MnO$$_{6}$$ ($$B':3d$$ transition-metal elements from V to Ni) being basically consistent with the Kanamori-Goodenough rule.

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Category:Materials Science, Multidisciplinary

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