NDLI: Structure and thermomagnetic properties of new feco-based.

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Structure and thermomagnetic properties of new feco-based.

Content Provider	CiteSeerX
Author	Ferromagnets, Nanocrystalline Johnson, F. Hughes, P. Gallagher, R. Laughlin, D. E. Mchenry, M. E. Willard, M. A. Harris, V. G.
Abstract	Abstract—FeCo-based ferromagnetic alloys (HIT-PERM variants) of composition Fe44 5Co44 5Zr7B4, Fe44Co44Zr5 7B3 3Ta2Cu1, Fe44Co44Zr5 7B3 3Mo2Cu1, and Fe37 2Co30 8Zr7B4Cu1 were prepared by melt-spinning amorphous precursors, followed by nanocrystallization. Samples were characterized using vibrating sample magnetometry (VSM), x-ray diffraction (XRD), and differential scanning calorimetry (DSC). VSM was used to measure magnetization vs. temperature from 370–1260 K. Magnetic data showed structural and magnetic phase transitions including primary and secondary crystallization events and the to a structural phase transition in FeCo nanocrystals. Ta and Mo were observed to suppress the to a transition temperature of FeCo. The Fe: Co 65: 35 alloy exhibits significant curvature in ( ) indicating proximity of the ferromagnetic to paramagnetic transition and the to transition. XRD phase analysis identified crystallized phases as-FeCo, (Fe,Co)3Zr, in agreement with previous reports for unmodified HITPERM alloys. DSC data, analyzed using the Kissinger technique, indicated that the removal of Cu from the original HITPERM composition increased the activation energy for primary crystallization, whereas Ta and Mo substitutions decrease the activation energy. Index Terms—FeCo alloys, nanocrystals, soft magnetic alloys. I.
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Subject Keyword	Thermomagnetic Property Activation Energy Hit-perm Variant Paramagnetic Transition Dsc Data Magnetic Phase Transition Kissinger Technique Structural Phase Transition Crystallized Phase Xrd Phase Analysis Whereas Ta Alloy Exhibit Significant Curvature Melt-spinning Amorphous Precursor Feco Nanocrystals Magnetic Data Mo Substitution Soft Magnetic Alloy X-ray Diffraction Primary Crystallization Differential Scanning Calorimetry Previous Report Composition Fe44 Abstract Feco-based Ferromagnetic Alloy Secondary Crystallization Event Magnetization V Original Hitperm Composition Index Term Feco Transition Temperature Unmodified Hitperm Alloy Sample Magnetometry
Content Type	Text

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