7 research outputs found
Perovskit SrRu1-xSnxO3 의 물리적 특성 변화
Get PDF학위논문 (석사)-- 서울대학교 대학원 : 물리학과, 2014. 2. 박제근.Orthorombic perovskite SrRuO3 and SrSnO3 have been studied for their unique properties. There is also theoretical expectation that Sr(Ru1-xSnx)O3 can be made a half-metal or dilute magnetic semiconductor by varing the doping ratio x. In order to study the doping effect, Sr(Ru1-xSnx)O3 were synthesized with a solid state reaction method and physical properties were measured. The volume of Sr(Ru,Sn)O3 change follows the Vegards law. In the Ru-rich side, the ferromagnetic transition temperature of SrRuO3 decreases with Sn doping, accmompanied by a change in resistivity. On the other hand, Sn-rich SrRu1-xSnxO3 samples show magnetic hysteresis in their magnetization. While SrRu0.3Sn0.7O3 has a positive Curie temperature and the coercive field increases with cooling, SrRu0.1Sn0.9O3 has a negative Curie temperature and the coercive field decreases with cooling.목 차
1 서론 1
2 실험 방법 3
2.1 시료준비 3
2.2 비저항 측정 4
2.2.1 2, 4 단자(probe) 측정 4
2.2.2 인터페이스 구축 5
2.2.3 인터페이스 테스트 7
2.2.4 시료 측정 8
2.3 자성측정 9
3 실험 결과 10
3.1 시료합성 및 X-ray 회절 패턴 10
3.2 비저항 측정 결과 14
3.3 자성 측정 결과 16
4 결론 19
참고문헌 20Maste
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