Direct and inverse measurement of thin films magnetostriction

Jay, J.P.; Berre, F. Le; Pogossian, S. P.; Indenbom, M. V.

doi:10.1016/j.jmmm.2010.02.011

Cited by 16 publications

(10 citation statements)

References 27 publications

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“…In the case of a single-crystal oriented such as [110] x In thin films, magnetostriction deformations are hindered by the much thicker substrate. In our experiment we measure the bending angle θ(H) of the cantilever tip when magnetic field is cycled from H max to −H max and back to H max with H max > H sat where H sat is the saturation field when magnetization reaches its saturation value 26 . The bending angles θ(H) are converted to stress using the well-known formula 41 :…”

Section: Magnetostrictionmentioning

confidence: 99%

Thickness dependence of magnetization reversal and magnetostriction in Fe81Ga19 thin films

Jahjah¹,

Manach²,

Grand³

et al. 2019

Phys. Rev. Applied

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Among the magnetostrictive alloys the one formed of iron and gallium (called "Galfenol" from its U.S. Office of Naval Research discoverers in the late 90's) is attractive for its low hysteresis, good tensile stress, good machinability and its rare-earth free composition. One of its applications is its association with a piezoelectric material to form a extrinsic multiferroic composite as an alternative to the rare room temperature intrinsic multiferroics such as BiFeO 3 . This study focuses on thin Fe 0.81 Ga 0.19 films of thickness 5, 10, 20 and 60 nm deposited by sputtering onto glass substrates. Magnetization reversal study reveals a well-defined symmetry with two principal directions independent of the thickness. The magnetic signature of this magnetic anisotropy decreases with increasing FeGa thickness due to an increase of the non-preferential polycrystalline arrangement, as revealed by transmission electron microscopy (TEM) observations. Thus when magnetic field is applied along these specific directions, magnetization reversal is mainly coherent for the thinnest sample as seen from the transverse magnetization cycles. Magnetostriction coefficient reaches 20 ppm for the 5 nm film and decreases for thicker samples, where polycrystalline part with non-preferential orientation prevails.PACS numbers: 68.55.-a, 68.35.bd,75.60.-d, 75.75.-c,75.80.+q, 81.15.Cd Keywords: Magnetization reversal, magnetic thin films. Thermoelasticity and electromagnetic elasticity (electroelasticity, magnetoelasticity). Beam, plate, and shell. Magnetic properties of monolayers and thin films. Magnetomechanical and magnetoelectric effect, magnetostriction. arXiv:1903.05397v2 [cond-mat.mtrl-sci]

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Section: Magnetostrictionmentioning

confidence: 99%

Thickness dependence of magnetization reversal and magnetostriction in Fe81Ga19 thin films

Jahjah¹,

Manach²,

Grand³

et al. 2019

Phys. Rev. Applied

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“…Magnetostriction is one of the most important magnetoelastic characteristics of soft magnetic materials, strongly related with the domain structure and the magnetization process. In the case of thin films, accurate measuring of saturation magnetostriction value is very difficult due to the elastic interaction between the film and the substrate [9]. One of the most common methods for measuring λ s in magnetostrictive thin films is the cantilever deflection method [10].…”

Section: Introductionmentioning

confidence: 99%

Fe73.5Cu1Nb3Si15.5B7 Thin Films Deposited by HiPIMS: Magnetic and Magnetostrictive Behavior

Velicu

Neagu

Tiron

2014

J Supercond Nov Magn

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Results concerning the magnetic, magnetostrictive, structural, morphological, and topological properties of amorphous and nanocrystalline Fe 73.5 Cu 1 Nb 3 Si 15.5 B 7 thin films deposited using the high power impulse magnetron sputtering (HiPIMS) technique are reported. In as-deposited state, the samples are amorphous, the nanocrystalline state being achieved for samples isothermally annealed at adequate temperatures, in an electric furnace. For the optimum annealing temperature (475 • C), a decrease by about 70 % for the coercive magnetic field (50 A/m) and up to 1 order of magnitude for the saturation magnetostriction (∼ 1×10 −6 ), compared to the as-deposited state, was obtained. The X-ray diffractometry (XRD) and scanning electron microscopy (SEM) results for samples thermally treated at 475 • C revealed a 53.6 % crystalline volume fraction of α-Fe(Si) nanograins with an average size of about 15 nm and a Si content of 10.78 %, uniformly dispersed in a residual amorphous matrix. Using the saturation magnetostriction values determined using the cantilever deflection method and the crystalline volume fraction of α-Fe(Si) nanograins, the contribution of crystalline phase to the saturation magnetostriction was also determined.Keywords Amorphous and nanocrystalline alloys · FeCuNbSiB thin films · High power impulse magnetron sputtering · Saturation magnetostriction · Soft magnetic materials I.-L. Velicu · M. Neagu ( ) · V. Tiron

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“…where Y s , ν s , and t s are the Young modulus, Poisson ratio, and thickness of the substrate and t f is the film thickness [24][25][26]. Young's modulus and Poisson's ratio in silicon are dependent on the orientation of the stress relative to the crystal axes of the sample.…”

Section: Methodsmentioning

confidence: 99%

Magnetostrictive properties of amorphous SmCo thin films with imprinted anisotropy

et al. 2014

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We examine the magnetostriction in amorphous SmCo thin films with a composition in the range 4-27 at. % Sm. The magnetostriction increases significantly with increasing Sm content but is small compared to terbium-based ferromagnetic compounds, despite the large imprinted anisotropy. The magnetostriction and anisotropy both increase approximately linearly as the temperature is reduced. The magnetoelastic energy is found to be far smaller than the anisotropy energy so the magnetoelastic atomic displacements during growth cannot be the origin of the imprinted anisotropy. The anisotropy is only slightly altered by the application of large tensile stresses, indicating that the local strain fields involved in magnetostriction are not equivalent to the global strain produced by mechanical bending.

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Direct and inverse measurement of thin films magnetostriction

Cited by 16 publications

References 27 publications

Thickness dependence of magnetization reversal and magnetostriction in Fe81Ga19 thin films

Thickness dependence of magnetization reversal and magnetostriction in Fe81Ga19 thin films

Fe73.5Cu1Nb3Si15.5B7 Thin Films Deposited by HiPIMS: Magnetic and Magnetostrictive Behavior

Magnetostrictive properties of amorphous SmCo thin films with imprinted anisotropy

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