Abstract
Magnetic and magnetocaloric properties of the amorphous Fe92−xZr8Bx ribbons were studied in this work. Fully amorphous Fe89Zr8B3, Fe88Zr8B4, and Fe87Zr8B5 ribbons were fabricated. The Curie temperature (Tc), saturation magnetization (Ms), and the maximum entropy change with the variation of a magnetic field (−ΔSmpeak) of the glassy ribbons were significantly improved by the boron addition. The mechanism for the enhanced Tc and −ΔSmpeak by boron addition was studied.
Highlights
With the rising concerns on environmental pollution and the higher and higher cost of energy, it is an urgent need recently to develop energy-saving and environmental-friendly materials, such as new energy storage materials, magnetocaloric materials, giant impedance materials, thermoelectric materials, and magneto-strictive materials [1,2,3,4,5]
The magnetocaloric materials have recently attracted more and more attention, and as a result, a great number of magnetocaloric alloys or compounds have been developed in the past several decades [8,9,10]
The amorphous alloys can be fabricated within a large compositional range, indicating that the Curie temperature (Tc ) and properties, depending on the alloy compositions, can be tuned [14]
Summary
With the rising concerns on environmental pollution and the higher and higher cost of energy, it is an urgent need recently to develop energy-saving and environmental-friendly materials, such as new energy storage materials, magnetocaloric materials, giant impedance materials, thermoelectric materials, and magneto-strictive materials [1,2,3,4,5]. When the Zr content is increased, the ∆Sm of the alloy becomes significantly improved: for instance, the magnetic properties, phase transitions, and MCE were systematically studied in amorphous Fe89−x Bx Zr11 (x = 0–10) alloys and the Tc got enhanced with B addition and the. The addition of a series of 3D elements, such as Cu, Cr, Mn, Co, Ni..., obtained a series of FeZrB-based amorphous alloys with a good ∆Sm value near room temperature [31,32,33,34,35,36]. Through the previous study on the Fe88 Zr8 B4 amorphous alloy [30,39,40], it is found that a moderate Zr content makes the alloy exhibit good magnetic properties near room temperature. The dependence of Tc as well as −∆Sm peak on the composition of the metallic glasses were constructed for the purpose of revealing the mechanism involved
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