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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 발행연도
- 2007.9
- 수록면
- 103 - 107 (5page)
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초록· 키워드
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Magnetic field induced structural transition has been systematically investigated for La<SUB>1-x</SUB>Ba<SUB>x</SUB>MnO₃ with the fine control of carrier doping (0.15 ≤ x ≤ 0.20). Application of a magnetic field results in the suppression of the rhombohedral-orthorhombic transition temperature (T<SUB>S</SUB>) and the increase of insulator-metal transition temperature (T<SUB>MI</SUB>). Near x = 0.17, where TS is similar to T<SUB>MI</SUB> at zero magnetic field, we found that the T<SUB>S</SUB> smoothly decreased with magnetic field even though it intersected the T<SUB>MI</SUB> near 3 T. Also, the magnetostructural phase diagram obtained from the temperature sweep and from the magnetic field sweep is not significantly modified. By comparing the magnetostructural transition in La<SUB>1-x</SUB>Sr<SUB>x</SUB>MnO₃, we have suggested that the large disorder originated from ionic size differences between La and Ba may weaken the sensitivity of the kinetic energy of e<SUB>g</SUB> electrons on the degree of lattice distortion in La<SUB>1-x</SUB>Ba<SUB>x</SUB>MnO₃.
목차
1. Introduction
2. Experiments
3. Results and Discussion
4. Conclusion
Acknowledgments
References
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UCI(KEPA) : I410-ECN-0101-2009-428-015913332