Long range ferromagnetic ordering in pulsed laser deposited La0.7Ca0.3Mn1-xRuxO3 thin films

作者：Singh B; Manoharan SS^*; Rao ML; Pai SP

来源：Physical Chemistry Chemical Physics, 2004, 6(16): 4199-4202.

DOI：10.1039/b405590j

We demonstrate the existence of the metal to insulator transition (T-MIT) up to 30% of Ru substitution at the Mn site, while the ferromagnetic transition (T-C) is sustained even beyond 30% Ru substitution in the pulsed laser deposited La0.7Ca0.3Mn1-xRuxO3 thin films. The presence of Ru(IV) and (V) states complementing the t(2g) and e(g) orbital parentage of Mn(III) and Mn( IV) brings about prolonged double exchange mediated magnetic and electronic interactions, as confirmed by the X-ray absorption spectra and a negative magneto resistance ratio (MR) up to 11% at T-MIT even for 30% Ru substitution.

• 出版日期2004