A new type of graphene fiber spring (GFS) has been demonstrated to possess a large elongation of up to 480% with a stable elasticity coefficient for 100,000 times of stretch. Remarkably, the GFS performs reversibly stretchable actuation under electrostatic effects, and responds to an applied magnetic field for the development of novel magnetostriction switches and actuators once functionalized ...

We discuss a hyperbolic aspect of magnetostriction. The equations governing the longitudinal motion consist of the nonlinear wave equations and the rate equations for the motion of spin for the magnetic moment. We show that the breakdown of smooth solutions will take place in finite time even if the initial data are smooth.

Abstract The effect of the change in size under influence an applied magnetic field (magnetostriction) was studied Fe 7 Se 8 single crystals. It shown that a systematic unit-cell constants, induced by external and dependent on direction magnitude this field, strongly correlates with spin reorientation temperature ( T SRT ) entropy change, which is magnetization. obtained results suggest relatio...

TbFe2 film prepared by a flash evaporation system onto Si(100) or polyamide substrate have been irradiated with different Ar ion doses at zero, 1.3x10 and 2.7x10 ions/cm and at 10 kV. Magnetostrictive properties of TbFe2 film with disordered structure, saturated magnetostriction and magnetostrictive susceptibility, improved by Ar ion beam irradiation due to increasing of in-plane compressive st...

Pressure effect on Curie temperature, dTc/dp, for amorphous Col-,B, alloys is estimated indirectly from forced volume magnetostriction even in Tc > Tcry. Results estimated indirectly show smaller values compared with those measured directly, and are consistent with thermal expansion. The value of dTc/dp extrapolated to Co agrees with that for crystalline Co.

We report the discovery of giant magnetostriction and huge negative thermal expansion (NTE) in itinerant-electron metamagnetic compound La0.85Ce0.15Fe12B6. This system presents multiple magnetic transformations, antiferromagnetic–ferromagnetic (AFM–FM) ferromagnetic–paramagnetic (FM–PM), driven by changes both external field temperature. The magnetic-field–dependent exhibits irreversible abrupt...

It was observed recently that the giant magnetoimpedance (GMI) effect in Fe-rich glass-coated amorphous microwires with positive magnetostriction can be improved significantly by means of post-annealing. The increase GMI is attributed to induced helical magnetic anisotropy surface layer microwire, which appears after annealing. application external stresses microwire may result changes its stru...

⎯ This paper compares two thick-film actuation technologies and assesses their suitability for use within micromachined devices. The materials are a piezoelectric composition, which exhibits a d33 coefficient of the order of 130pC/N, and a magnetostrictive material which possess a magnetostriction of 4.4ppm at a magnetic field of 11.5kA/m. Examples of their application in micromachined devices ...