2020
DOI: 10.1016/j.jnoncrysol.2020.119935
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Microstructure and its effect on magnetic and magnetocaloric properties of the Co50Gd50-xFex glassy ribbons

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Cited by 23 publications
(12 citation statements)
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“…n is about 0.771 for Fe 89 Zr 8 B 3 at 270 K, 0.769 for Fe 88 Zr 8 B 4 at 290 K, and 0.766 for Fe 87 Zr 8 B 5 at 305 K. The values of n near T c are approximately consistent in the alloys, and the alloys with fully amorphous structures exhibit 2rd magnetic phase transition [ 17 , 41 , 42 ]. The n - T curves for the Fe 92−x Zr 8 B x glassy samples, seen in the inset of Figure 6 a, display typical magnetocaloric behaviors of soft magnetic metallic glasses: n is nearly 1 at low temperature when the sample is ferromagnetic, then gradually reduces to a minimum value near T c , and finally increases dramatically to a value up to 2 at the paramagnetic state [ 18 , 43 ].…”
Section: Resultsmentioning
confidence: 99%
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“…n is about 0.771 for Fe 89 Zr 8 B 3 at 270 K, 0.769 for Fe 88 Zr 8 B 4 at 290 K, and 0.766 for Fe 87 Zr 8 B 5 at 305 K. The values of n near T c are approximately consistent in the alloys, and the alloys with fully amorphous structures exhibit 2rd magnetic phase transition [ 17 , 41 , 42 ]. The n - T curves for the Fe 92−x Zr 8 B x glassy samples, seen in the inset of Figure 6 a, display typical magnetocaloric behaviors of soft magnetic metallic glasses: n is nearly 1 at low temperature when the sample is ferromagnetic, then gradually reduces to a minimum value near T c , and finally increases dramatically to a value up to 2 at the paramagnetic state [ 18 , 43 ].…”
Section: Resultsmentioning
confidence: 99%
“…The −∆S m ∝H n relationship for the three samples were constructed and the n values at different temperatures were obtained. Figure 6a, display typical magnetocaloric behaviors of soft magnetic metallic glasses: n is nearly 1 at low temperature when the sample is ferromagnetic, then gradually reduces to a minimum value near T c , and finally increases dramatically to a value up to 2 at the paramagnetic state [18,43]. * The maximum magnetic entropy change (−ΔSm) value in the −ΔSm-T curves.…”
Section: Temperature(k)mentioning
confidence: 99%
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“…The −Δ S m peak values of the Tb 62.5 Co 37.5 amorphous alloy are much higher than those of the TbCo amorphous ribbons, which is most likely related to the higher magnetic moment of a Tb 62.5 Co 37.5 amorphous alloy due to its high Tb concentration and the high magnetic moment of the Tb3+ ions (~9.72 μB) [ 28 ]. Considering the potential application perspective the linear −Δ S m peak ∝ T c −2/3 relationship in Gd-based amorphous alloys [ 10 , 11 , 17 , 29 ], we constructed the −Δ S m peak - T c −2/3 plots of Tb x Co 100-x glassy ribbons obtained from the (−Δ S m )- T plots under 5 T, as shown in Figure 4 b. Unlike the linear relationship between the −Δ S m peak - T c −2/3 plots in the binary Gd–Co glassy alloys, as also shown in Figure 4 b for comparison purposes, the relationship between −Δ S m peak and T c −2/3 in the Tb–Co binary amorphous samples is more like a para-curve than a linear relationship.…”
Section: Resultsmentioning
confidence: 99%
“…Amorphous magnetocaloric alloys, as an important category of magnetic refrigerant, show potential applications from the perspective of magnetic refrigerators because they possess a rather broad “hillside” of magnetic entropy change (−Δ S m ) and a low but adequate maximum −Δ S m (−Δ S m peak ), which results in an ultrahigh refrigeration capacity ( RC ) [ 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 ]. This makes it possible to design and manufacture metallic glass composites with a flattened −Δ S m peak within a tailorable temperature span because magnetic refrigerant with a flattened −Δ S m peak within the cold end and the hot end of a refrigerator is expected to be optimal in an Ericsson cycle [ 6 , 7 , 8 , 9 ].…”
Section: Introductionmentioning
confidence: 99%