Large Magnetovolume Effect Induced by Embedding Ferromagnetic Clusters into Antiferromagnetic Matrix of Cobaltite Perovskite

Strain-induced high-temperature perovskite ferromagnetic insulator

Ferromagnetic insulators are required for many new magnetic devices, such as dissipationless quantum-spintronic devices, magnetic tunneling junctions, etc. Ferromagnetic insulators with a high Curie temperature and a high-symmetry structure are critical integration with common single-crystalline oxide films or substrates. So far, the commonly used ferromagnetic insulators mostly possess low-sym...

Intergranular giant magnetoresistance in a spontaneously phase separated perovskite oxide.

We present small-angle neutron scattering data proving that, on the insulating side of the metal-insulator transition, the doped perovskite cobaltite La(1-x)Sr(x)CoO(3) phase separates into ferromagnetic metallic clusters embedded in a nonferromagnetic matrix. This induces a hysteretic magnetoresistance, with temperature and field dependence characteristic of intergranular giant magnetoresistan...

Exchange coupling induced antiferromagnetic-ferromagnetic transition in Pr0.5Ca0.5MnO3/La0.5Ca0.5MnO3 superlattices.

MAGNETOVOLUME EFFECT IN FERROMAGNETIC METALS : NUMERICAL RESULTS FOR BCC Fe AND FCC Ni

The magnetovolume effect in ferromagnetic bcc Fe and fcc Ni is estimated numerically in the fixed moment method by using the LMTO method and the local spin density approximation. The obtained results are compared with the experimental results. The magnetovolume effect is discussed by using the local spin density approximation [I-31 or by using the Stoner model where the volume dependence of the...

Noncollinear magnetism caused by intermixing at ferromagnetic/antiferromagnetic interfaces

Fe-Cr alloy layers on Fe 001 substrates with different atomic environments are theoretically investigated through a self-consistent real-space tight-binding method parametrized to density functional theory and without collinear restriction for the spin directions. We show that the intermixing at the Cr/Fe interface, experimentally observed at the first stages of the Cr growth on Fe, originates ...