Magnetic Hysteresis in Nanostructures with Thermally Controlled RKKY Coupling.

Mechanisms of the recently demonstrated ex-situ thermal control of the indirect exchange coupling in magnetic multilayer are discussed for different designs of the spacer layer. Temperature-induced changes in the hysteresis of magnetization are shown to be associated with different types of competing interlayer exchange interactions. Theoretical analysis indicates that the measured step-like shape and hysteresis of the magnetization loops is due to local in-plane magnetic anisotropy of nano-crystallites within the strongly ferromagnetic films.

Profound Interfacial Effects in CoFeO/FeO and FeO/CoFeO Core/Shell Nanoparticles.

Two sets of core/shell magnetic nanoparticles, CoFeO/FeO and FeO/CoFeO, with a fixed diameter of the core (~ 4.1 and ~ 6.3 nm for the former and latter sets, respectively) and thickness of shells up to 2.

Effect of Synthesis Method of LaSr MnO Manganite Nanoparticles on Their Properties.

Nanoparticles of lanthanum-strontium manganite were synthesized via different methods, namely, sol-gel method, precipitation from non-aqueous solution, and precipitation from reversal microemulsions. It was shown that the use of organic compounds and non-aqueous media allowed significantly decreasing of the crystallization temperature of nanoparticles, and the single-phased crystalline product was formed in one stage. Morphology and properties of nanoparticles depended on the method and conditions of the synthesis.

ESR Study of (La,Ba)MnO/ZnO Nanostructure for Resistive Switching Device.

Structure, electric, and resonance properties of (La,Ba)MnO/ZnO nanostructure grown on SrTiO (001) substrate have been investigated. It is found that at room temperature and relatively low voltages (|V |< 0.2 V), the structure shows good rectification behavior with rectification factor near 210.

Effect of Synthesis Temperature on Structure and Magnetic Properties of (La,Nd)SrMnO Nanoparticles.

Two sets of Nd-doped LaSrMnO nanoparticles were synthesized via sol-gel method with further heat treatment at 1073 and 1573 K, respectively. Crystallographic and magnetic properties of obtained nanoparticles were studied, and the effect of synthesis conditions on these properties was investigated. According to X-ray data, all particles crystallized in the distorted perovskite structure.

Iron-Doped (La,Sr)MnO3 Manganites as Promising Mediators of Self-Controlled Magnetic Nanohyperthermia.

Fe-doped La0.77Sr0.23Mn1 - y Fe y O3 nanoparticles have been synthesized by sol-gel method, and ceramic samples based on them were sintered at 1613 K.