X-ray photoemission characterization of La_{0.67}(Ca_{x}Sr_{1-x})_{0.33}MnO_{3} films

Дата и время публикации : 1999-01-19T20:41:32Z

Авторы публикации и институты :
P. R. Broussard
V. M. Browning
V. C. Cestone

Ссылка на журнал-издание: J. Appl. Phys. 85, 5414 (1999)
Коментарии к cтатье: 3 pages, 5 eps figures. To be published in Journal of Applied Physics (Proceedings of MMM’98)
Первичная категория: cond-mat.str-el

Все категории : cond-mat.str-el

Краткий обзор статьи: The Curie temperature and x-ray photoemission spectra of thin films of La_{0.67}(Ca_{x}Sr_{1-x})_{0.33}MnO_{3} (LCSMO) have been studied as a function of the Ca/Sr ratio. The films were grown by off-axis cosputtering from individual targets of La_{0.67}Ca_{0.33}MnO_{3} (LCMO) and La_{0.67}Sr_{0.33}MnO_{3} (LSMO) onto (100) oriented NdGaO_{3} substrates. The films grow with a (100) orientation, with no other orientations observed by x-ray diffraction. For the alloy mixtures, the Curie temperature, T_C, varies slowly as the Ca/Sr is decreased, remaining $approx$ 300 K, while for the LCMO and LSMO films T_C is 260 and 330 K, respectively. The Mn-O valence structure is composed of two dominant peaks, whose positions undergo a change as the Ca fraction is decreased. The core lines behave as linear combinations of lines from pure LCMO and LSMO.

Category: Physics