Magnetic domains and twin structure of the La0.7Sr0.3MnO3 single crystal

Using a magneto-optical indicator film imaging technique and an x-ray topog raphy, we have observed a strong correlation between magnetic and twin stru cture of a single crystal of La0.7Sr0.3MnO3 (LSMO). The correlation between magnetic and twin domains can be understood in terms of a rhombohedral def ormation of the cubic cell of LSMO which is accompanied by an occurrence of a magnetic anisotropy. Our data and analysis suggest that twin domains pla y a fundamental role in a low-field magnetization behavior and in magnetotr ansport properties of LSMO. (C) 2000 American Institute of Physics. [S0003- 6951(00)02841-2].