Magnetic and electronic properties of B-site-ordered double-perovskite oxide LaCrMnO thin films

Bサイトが秩序化されたダブルペロブスカイトLaCrMnO薄膜の磁気および電子状態の研究

吉松 公平*; 石丸 純也*; 渡会 啓介*; 山本 航平*; 平田 靖透*; 和達 大樹*; 竹田 幸治   ; 堀場 弘司*; 組頭 広志*; 坂田 修身*; 大友 明*

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 LaCrMnO 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 and Mn ions, resulting in ferrimagnetism of the B-site-ordered double-perovskite LaCrMnO. 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 -site-ordered LaMnO ( transition-metal elements from V to Ni) being basically consistent with the Kanamori-Goodenough rule.