A Spin-Polarized 2D-ACAR Study of the Colossal Magnetoresistive Material La_(0.7)Sr_(0.3)MnO_3

摘要

Although calculations of the electronic structure of colossal magnetoresistive materials have been performed by several groups, experimental support for these calculations has been lacking. In an effort to contribute this support we have performed spin-polarized 2D-ACAR measurements on a single-crystal sample of the manganite perovskite, La_(0.7)Sr_(0.3)MnO_3. Masurements were made at three well-separated temperatures, two of which were below the paramagnetic to ferromagnetic transition temperature of 369K. At the lowest temperature, 35 K, the experimental results show exceptional agreement with the results of the most recent band structure calculations.