Temperature-Dependent Giant Magnetoimpedance Effect in Amorphous Soft Magnets

Kurniawan, Michael; Roy, Rajat; Panda, Ashis K.; Greve, David W.; Ohodnicki, Paul R.; McHenry, M. E.

doi:10.1007/s11664-014-3469-7

Cited by 18 publications

(11 citation statements)

References 33 publications

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“…Large induced transverse anisotropy is beneficial for high frequency and sensing applications. 45,55 The strain annealed HTX005 ribbons exhibit linear hysteresis loops, shown implicitly here by a reduction in l. This finding is similar to a prior work by Kernion et al who investigated the temperature and strain dependence on strain annealed (Co 1Àx Fe x ) 89 Zr 7 B 4 (x 5 0, 0.025, 0.1). 49 There is a noticeable difference in the thermal stability of Fe-based FINEMET alloys.…”

Section: Resultssupporting

confidence: 88%

“…21 Soft magnetic alloys with higher T C will be beneficial for applications such as magnetic field or current sensors for high temperature environment (e.g., deep drilling, fracking). [55][56][57][58] HTX005-TaC and HTX005-HfC also exhibit lower T x compared to HTX005-Ta and HTX005-Hf. However, T C of HTX005-TaC and HTX005-HfC is lower than those of HTX005-Ta and HTX005-Hf, which is opposite of that observed in FINEMET alloys.…”

Section: Resultsmentioning

confidence: 99%

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Effect of alloy substituents on soft magnetic properties and economics of Fe-based and Co-based alloys

2015

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Amorphous and nanocrystalline soft magnetic alloys have garnered interests in academia and industry due to their potentials for applications, such as power transformers, electric motors, and sensors. To achieve good glass formability, thermal stability, and prevent grain overgrowth, elements such as B, Nb, Ta, and Hf are used in many soft magnetic systems. However, the high price of these precursors results in expensive soft magnetic alloys. Herein, we report on substituting Ta and Hf with TaC and HfC, respectively, to significantly reduce the cost of Fe-based FINEMET and Co-based HTX005 alloys. Soft magnetic properties of these alloys are studied. The effect of thermal annealing and strain annealing on TaC and HfC substituted alloys are also investigated. Lastly, we discuss the cost analysis on these alloys. Using the synthesis route presented here, a cost reduction of up to 74% can be achieved.

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Section: Resultssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Effect of alloy substituents on soft magnetic properties and economics of Fe-based and Co-based alloys

2015

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“…1(a) and 1(b)). 11,20 Above 290 C, the magnetic anisotropy (H k ) was not observable. With the increase in temperature, the anisotropy (H k ) was observed to exhibit values between 1.1-1.5 Oe in the 20 C-230 C temperature regime and falls rapidly at 260 C-290 C (Fig.…”

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confidence: 99%

“…1(b) agrees well with our recent work. 20 The insets in Figs During the synthesis of soft magnetic microwires, the molten alloys are cooled down with a typical rate around 10 5 K/s. 2,19 The atomic diffusion does not occur during this rapid solidification, and thus, an amorphous structure will result.…”

mentioning

confidence: 99%

“…Similar to our previous report, a rapid drop of impedance (Z mag ) occurs at $290 C, corresponding with the Curie temperature of the amorphous phase (T C am ). 20 To better understand the irreversibility of the magnetic anisotropy (H k ) during the temperature cycle (Figs. 4(a) and 4(b)), we measured the GMI vs. temperature profiles in 3 temperature cycles (Fig.…”

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