news & views Nevertheless, a few hurdles must be overcome before SBA dielectrics will make a significant impact on large-scale transistor manufacturing. Perhaps the biggest problem at the moment is the slow response of the sodium ions to an external electric field. Consequently, the capacitance of the SBA films is reduced at higher frequencies. Solid-polymer electrolytes typically suffer from a...

Lattice parameters, magnetization, thermal expansion and magnetostriction of a series of single crystal and polycrystalline specimens of Tb-Sc alloys have been measured. The various experimental observations are examined in terms of the single ion theory of Callen & Callen and the magnetoelastic energy evaluated for the various compositions.

Title of Document: MAGNETOELASTIC COUPLING IN NiMnGa FERROMAGNETIC SHAPE MEMORY ALLOY Peng Zhao, Doctor of Philosophy, 2006 Directed By: Professor, Manfred Wuttig, Department of Materials Science and Engineering NiMnGa alloys have attracted extensive attention because their ferromagnetic characteristic provides an additional degree of freedom to control both the shape memory effect and the mult...

We consider periodic domain structures which appear due to the magnetoelastic interaction if the antiferromagnetic crystal is attached to an elastic substrate. The peculiar behavior of such structures in an external magnetic field is discussed. In particular, we find the magnetic field dependence of the equilibrium period and the concentrations of different domains.

The new double perovskite Mn2MnReO6 has been synthesised at high pressure. Mn(2+) and Re(6+) spins order antiferromagnetically through two successive transitions that are coupled by magnetoelastic effects, as order of the Mn spins at 109 K leads to lattice distortions that reduce frustration prompting Re order at 99 K.

A force m onitoring system consisting of stress-sensitive magnetoelastic strips forremotely measuring the force profile across a hard surface is described. Under the excitation of amagnetic AC field, the m agnetoelastic strips generated higher-order harmonic fields (magneticAC fields at multiple frequencies of the excitation field), allowing remote measurement of theirresponses ...

BACKGROUND Because of the unique electromagnetic characteristics of the magnetoelastic microwire, the changes in the pressure of a fluid will provoke a variation of the mechanical pressure on the sensor, which will cause a variation of its magnetization that will be detectable wirelessly. Thus, a wireless system can be developed for following up vascular surgery procedures. METHODS AND RESULT...

Sound attenuation and velocity in nickel single crystals have been studied as function of frequency (10 to 250 MHz), temperature, strength and direction of external magnetic field along , (110> and , for the three pure wave modes propagating along . The observed effects are found to be specific for each combination of sound mode and field direction, and especially interesting for...