Reinvestigation of the intrinsic magnetic properties of (Fe$_{1-x}$Co$_x$)$_2$B alloys and crystallization behavior of ribbons
Journal of Magnetism and Magnetic Materials, 2020, 513, 167214 New determination of the magnetic anisotropy from single crystals of (Fe$_{1-x}$Co$_x$)$_2$B alloys are presented. The anomalous temperature dependence of the anisotropy constant is discussed using the standard Callen-Callen theory, whic...
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Zusammenfassung: | Journal of Magnetism and Magnetic Materials, 2020, 513, 167214 New determination of the magnetic anisotropy from single crystals of
(Fe$_{1-x}$Co$_x$)$_2$B alloys are presented. The anomalous temperature
dependence of the anisotropy constant is discussed using the standard
Callen-Callen theory, which is shown to be insufficient to explain the
experimental results. A more material specific study using first-principles
calculations with disordered moments approach gives a much more consistent
interpretation of the experimental data. Since the intrinsic properties of the
alloys with $x=0.3-0.35$ are promising for permanent magnets applications,
initial investigation of the extrinsic properties are described, in particular
the crystallization of melt spun ribbons with Cu, Al, and Ti additions.
Previous attempts at developing a significant hysteresis have been unsuccessful
in this system. Our melt-spinning experiment indicates that this system shows
rapid crystallization. |
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DOI: | 10.48550/arxiv.2007.15113 |