CAJ | 학술논문

为深入理解Nd0.52Sr0.48MnO3薄膜中的庞磁电阻效应，运用数学解析以及物理概念分析的方法，对Wagner等人提出的在Nd0.52Sr0.48MnO3薄膜中庞磁电阻随磁场变化规律的模型进行了分析，并对该模型的自洽性进行了讨论．结果发现只有通过某些必要的修正，Wagner模型方可自洽．还研究了Nd0.52Sr0.48MnO3薄膜中大自旋极化子（large spin polarons）在居里温度附近的行为特征，发现在居里温度附近磁性团簇的尺寸变化较为异常，对此现象的物理机制进行了初步探讨．
위심입리해Nd0.52Sr0.48MnO3박막중적방자전조효응，운용수학해석이급물리개념분석적방법，대Wagner등인제출적재Nd0.52Sr0.48MnO3박막중방자전조수자장변화규률적모형진행료분석，병대해모형적자흡성진행료토론．결과발현지유통과모사필요적수정，Wagner모형방가자흡．환연구료Nd0.52Sr0.48MnO3박막중대자선겁화자（large spin polarons）재거리온도부근적행위특정，발현재거리온도부근자성단족적척촌변화교위이상，대차현상적물리궤제진행료초보탐토．
To achieve a better understanding of the effects of the colossal magnetoresistivity in the mixed-valence manganites,the model of a negative-magnetoresistivity scaling proposed by Wagner et al is explored in both mathematical and physical analyses.The inconsistency in Wagners model is discussed and corrected. The behaviors of the large spin polarons in Nd0.52Sr0.48MnO3 film at Tc are studied and analyzed.The results show that only through necessary corrections can Wagners model become self-consistent. A further exploration of the nature of the magnetically aligned clusters will make the model more convincing.