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열처리 효과에 따른 Zn0.7Mn0.3O 박막의 자기 특성 연구
김영미(Y. M. Kim),김유경(Y. Kim),윤명근(M. Yoon),박찬수(C. S. Park),이연숙(Y. S. Lee),전미선(M. S. Jeon),박일우(I.-W. Park),박용주(Y. J. Park),유종훈(Jong H. Lyou),김상수(S. S. Kim) 한국자기학회 2003 韓國磁氣學會誌 Vol.13 No.4
We report on the annealing effect and ferromagnetic characteristics of Zn_(0.7)Mn_(0.3)O film prepared by sol-gel method on the silicon (100) substrate using field emission-scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), X-ray diffractometry (XRD) and superconducting quantum interference device (SQUID) magnetometry. Magnetic measurements show that Zn_(0.7)Mn_(0.3)O films exhibit ferromagnetism at 5 K revealing the coercive field of ~110 Oe for as grown sample and 360, 1035 Oe for samples annealed at 700, 800 ℃, respectively. Our experimental evidence suggests that ferromagnetic precipitates of a manganese oxide may be responsible for the observed ferromagnetic behaviors of the film.