Articles you may be interested inCrossover of angular dependent magnetoresistance with the metal-insulator transition in colossal magnetoresistive manganite films Appl. Phys. Lett. 95, 132506 (2009); 10.1063/1.3240407 Magnetoresistive anisotropy and magnetoresistivity in strained La 0.65 Ca 0.35 Mn O 3 films near the metalinsulator transition Appl. Phys. Lett. 90, 232506 (2007); 10.1063/1.2746956 Suppression of the metal-insulator transition temperature in thin La 0.7 Sr 0.3 Mn O 3 films J. Appl. Phys. 96, 6387 (2004); 10.1063/1.1812599 Nd 0.8 Y 0.2 NiO 3 thin films with room-temperature metal-insulator transition deposited by pulsed laser ablation J. Appl. Phys. 93, 5136 (2003); 10.1063/1.1563815 Microstructure and magnetic properties of strained La 0.7 Sr 0.3 MnO 3 thin filmsMagnetic and transport properties of SrRuO 3 film grown on SrTiO 3 at different substrate temperatures have been investigated. Metallic behavior over the temperature range from 5 to 300 K is observed in the film grown at 750°C. With a decrease in the growth temperature, a metal-insulator transition occurs for films grown at 700 and 650°C, with transition temperatures of 15 K and 250 K, respectively, and a complete insulator behavior shows up in the film grown at 600°C. Correspondingly, out-of-plane ͑OOP͒ magnetic anisotropy is gradually weakened, leading to complete magnetic isotropy in the film grown at 600°C. The OOP lattice constant increases from 0.395 nm, for the film grown at 750°C, up to 0.403 nm for the film grown at 600°C. The correlation between the magnetic properties, transport properties, and the lattice constants indicates that the magnetic anisotropy and the metal-insulator transition ͑or insulator behavior͒ are caused mainly by strain in the SRO films, with correspondingly larger strain in films grown at lower temperatures.

A theoretical model has been set up to investigate analytically the effective anisotropy field of the single‐phase and anisotropic nanostructured ferromagnetic materials with uniaxial magnetocrystalline anisotropy. It is revealed that the effective anisotropy field decreases with the grain alignment by the increased deviation of the magnetization from the easy‐axis in the transition region and the enhanced suppressing effect of the intergrain exchange coupling on the anisotropy. It is suggested that magnetic properties such as the soft magnetic properties could be improved by controlling the crystallographic orientation and the intergrain or interlayer exchange coupling. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)