Measurement of saturation magnetostriction of a thin amorphous ribbon by means of small-angle magnetization rotation

Narita, Kozo; Yamasaki, J.; Fukunaga, H.

doi:10.1109/tmag.1980.1060610

Cited by 257 publications

(55 citation statements)

References 9 publications

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“…The saturation magnetostriction constant,  S , of as-cast samples was measured applying the small angle magnetization rotation method (SAMR) [12] on long samples (~5 mm wide and ~150 mm long).…”

Section: Methodsmentioning

confidence: 99%

Partial substitution of Co and Ge for Fe and B in Fe–Zr–B–Cu alloys: microstructure and soft magnetic applicability at high temperature

et al. 2005

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The partial substitutions of Co for Fe and Ge for B are studied for a Fe 83-x Co x Zr 6 B 10-y Ge y Cu 1 alloy series (x = 0, 5 and 20; y = 0 and 5) as a possible way to enhance the high temperature applicability of NANOPERM alloys. The devitrification process, the nanocrystallization kinetics and the nanocrystalline microstructure are similar for all the studied alloys. Good soft magnetic properties are observed even at a high crystalline volume fraction of bcc -Fe nanocrystals, which are stable up to ~1000 K. The partial substitution of Co for Fe is very effective to increase the Curie temperature of the residual amorphous matrix (T C AM ). Although the substitution of Ge for B is ineffective to increase T C AM , a clear increase of the saturation magnetization with respect to the Ge-free alloy can be observed. These nanocrystalline compositions have a high concentration of Fe and a typical composition: Fe-M-ET-(Cu), where M is a metalloid and ET is an early transition metal. The addition of metalloids, such as B, P, Si, etc., is necessary to enable the production of a precursor amorphous alloy by rapid quenching techniques, from which the nanocrystalline microstructure is obtained after controlled crystallization. It is important to distinguish two different kinds of metalloids: those highly soluble in the -Fe phase (e.g. Si) and those whose solubility in this phase is very restricted (e.g. B). The former elements will be generally dissolved in the crystalline phase, increasing the crystalline volume fraction but deteriorating some magnetic properties like the saturation magnetization and the Curie temperature of the crystalline phase. The latter elements will remain in the amorphous matrix and will diminish the maximum volume fraction of nanocrystals, although preserving the purity of the -Fe phase.The early transition metals (Zr, Nb, Hf, etc.) have a very low solubility in the -Fe phase and, consequently, will remain in the amorphous matrix. However, due to the very slow diffusivity of these elements in the amorphous phase, they pile up at the crystal-matrix interface and constrain the growth of the crystalline phase to the nanocrystalline scale. was proposed mainly because of the strong increase of the Curie temperature of the residual amorphous phase (T C AM ) due to the partial substitution of Co for Fe with respect to the Cofree NANOPERM alloy [7]. In fact, the exchange coupling between nanocrystals is transmitted through the ferromagnetic residual amorphous matrix and thus, at temperatures above the Curie temperature of this residual amorphous matrix, the nanocrystals become exchange uncoupled and, consequently, the outstanding soft magnetic properties of these In this work, the combined effect of partial substitution of Co for Fe and Ge for B on the microstructure and the magnetic properties of nanocrystalline alloys is studied. The maximum Co concentration studied in the alloys is 20 at. %, in order to search for a new showed that this parameter is seriously deteriorated for higher Co con...

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Section: Methodsmentioning

confidence: 99%

Partial substitution of Co and Ge for Fe and B in Fe–Zr–B–Cu alloys: microstructure and soft magnetic applicability at high temperature

et al. 2005

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“…Numerous techniques have been developed to measure the magnetostriction constant (k) including both direct and indirect methods. [20][21][22][23] However, considerable debate continues with regard to the accuracy of each method. The discrepancy in k sat values may be due to the effects of material defects and dislocations due to handling, or internal stress caused by material deposition and sample preparation methods.…”

Section: -mentioning

confidence: 99%

Stress reconfigurable tunable magnetoelectric resonators as magnetic sensors

Kiser

Finkel

Gao

et al. 2013

Applied Physics Letters

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We report a magnetoelastic effect in doubly clamped ferromagnetic magnetostrictive Metglas resonators with electrically and magnetically reconfigurable frequency response. The field-induced resonance frequency shift is due to magnetostrictive strain, which is shown to have a strong dependence on uniaxial stress. Here, we demonstrate that this magnetic field induced behavior can be used as the basis for a simple, tunable, magnetoelectric magnetic field sensor. The effect of tension on the field dependent magnetostrictive constant and the sensor sensitivity is examined, and the equivalent magnetic noise floor of such a sensor is estimated.

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“…The magnetostriction coefficient, λ s of the samples has been evaluated using small angle magnetization rotation (SAMR) method initially proposed for the materials exhibiting only magnetization rotation [32] and recently extended for the case of magnetic microwires [33].…”

Section: Experimental Methodsmentioning

confidence: 99%

Engineering of Magnetic Properties of Magnetic Microwires

Zhukov

Ipatov²,

Blanco

et al. 2018

Acta Phys. Pol. A

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We present an overview of the factors affecting soft magnetic properties, fast domain wall propagation and giant magnetoimpedance (GMI) effect in thin amorphous wires. The magnetoelastic anisotropy is one of the most important parameters that determine the magnetic properties of glass-coated microwires and therefore annealing can be very effective for manipulation the magnetic properties of amorphous ferromagnetic glass-coated microwires. Increasing of DW velocity in Fe-rich and Fe-Ni based (low Ni content) microwires is achieved after annealing. After heat treatment of Co-rich microwires we can observe transformation of inclined hysteresis loops to rectangular and coexistence of fast magnetization switching and GMI effect in the same sample. On the other hand stress annealing of Fe-and Co-rich microwires allows achievement of considerable magnetic softening and GMI effect enhancement.

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Measurement of saturation magnetostriction of a thin amorphous ribbon by means of small-angle magnetization rotation

Cited by 257 publications

References 9 publications

Partial substitution of Co and Ge for Fe and B in Fe–Zr–B–Cu alloys: microstructure and soft magnetic applicability at high temperature

Partial substitution of Co and Ge for Fe and B in Fe–Zr–B–Cu alloys: microstructure and soft magnetic applicability at high temperature

Stress reconfigurable tunable magnetoelectric resonators as magnetic sensors

Engineering of Magnetic Properties of Magnetic Microwires

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