Semiconductor spintronics has recently been recognized for its potential to combine the spin selectivity and nonvolatility of ferromagnetic compounds with the ability to fabricate hybrid thin-film devices naturally integrated with conventional semiconductors [1]. Yet in order to succeed in technological applications one has to be able to introduce roomtemperature spin-polarized materials that a...

Making use of the stress induced magnetic anisotropy in some iron-rich FeCuh'bSiB nanocrystalline materials we studied the thermal dependence of their magnetostriction which becomes zero below the Curie temperature. The choice of a suitable composition and annealing temperature results in materials with zero magnetostriction at room temperature. Due to the low magnetostriction these materials h...

Using a Ginzburg-Landau model for the magnetic degrees of freedom with coupling to disorder, we demonstrate through simulations the existence of stripelike magnetic precursors recently observed in Co-Ni-Al alloys above the Curie temperature. We characterize these magnetic modulations by means of the temperature dependence of local magnetization distribution, magnetized volume fraction, and magn...

High density sodium lithium niobate lead free ceramics near the morphtropic phase boundary [NaxLi1−xNbO3, (LNN), x=0.12] were prepared by the solid state reaction method. XRD patterns showed that the lattice structures were changed after polarization. The temperature dependence of the dielectric constant and dielectric loss, pyroelectric coefficient and DSC curves of LNN ceramics showed that th...