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LaVO₃/SrRuO₃ 초격자 인공구조 박막의 합성과 그 자기적 특성
곽용수(Y. S. Kwak),송종현(J. H. Song) 한국자기학회 2017 韓國磁氣學會誌 Vol.27 No.6
The perovskite superlattice structure consisting of Mott-insulator LaVO₃ and ferromagnetic SrRuO₃ was synthesized by Pulsed Laser Deposition method. It can be confirmed that the superlattice lattice constant is 12.65 and the superlattice structure is very similar to the measured X-ray diffraction result when LaVO₃ (1.5 unit lattice)/SrRuO₃ (1.5 unit lattice) is analyzed. Unlike SrRuO₃ monolayer films with a Curie temperature of about 130 K, the ferromagnetic properties were measured from a low temperature of 10 K to a room temperature of 300 K, which is the only characteristic of the superlattice artificial structure. These peculiar magnetic properties of LaVO₃/SrRuO₃ superlattice can be interpreted as the result of exchange-interaction between Ru-O-V ordering that only realize by superlattice artificial structure.