Design of thermal hysteresis in nonstoichiometric alloys with giant magnetocaloric effect
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| Autores principales: | , , , , , , , , , , , , , , |
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2024
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| author | Ghorai, Sagar Clulow, Rebecca Cedervall, Johan Huang, Shuo Ericsson, Tore Häggström, Lennart Skini, Ridha Shtender, Vitalii Vitos, Levente Eriksson, Olle Scheibel, Franziska Skokov, Konstantin Gutfleisch, Oliver Sahlberg, Martin Svedlindh, Peter |
| author_facet | Ghorai, Sagar Clulow, Rebecca Cedervall, Johan Huang, Shuo Ericsson, Tore Häggström, Lennart Skini, Ridha Shtender, Vitalii Vitos, Levente Eriksson, Olle Scheibel, Franziska Skokov, Konstantin Gutfleisch, Oliver Sahlberg, Martin Svedlindh, Peter |
| contents | The non-stoichiometric Fe$_2$P-type (FeMnP$_{0.5}$Si$_{0.5}$)$_{1-x}$(FeV)$_{x}$ alloys ( $x=0, 0.01$, $0.02$, and $0.03$) have been investigated as potential candidates for magnetic refrigeration near room temperature. The magnetic ordering temperature decreases with increasing FeV concentration, $x$, which can be ascribed to decreased ferromagnetic coupling strength between the magnetic atoms. The strong magnetoelastic coupling in these alloys results in large values of the isothermal entropy change ($ΔS_M$); $15.7$ J/kgK, at $2$ T magnetic field for the $x = 0$ alloy. $ΔS_M$ decreases with increasing $x$. Results from M{ö}ssbauer spectroscopy reveal that the average hyperfine field (in the ferromagnetic state) and average center shift (in the paramagnetic state) have the same decreasing trend as $ΔS_M$. The thermal hysteresis ($ΔT_{hyst}$) of the magnetic phase transition decreases with increasing $x$, while the mechanical stability of the alloys improves due to the reduced lattice volume change across the magnetoelastic phase transition. The adiabatic temperature change $ΔT_{ad}$, which highly depends on $ΔT_{hyst}$, is $1.7$ K at $1.9$ T applied field for the $x = 0.02$ alloy. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_01747 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Design of thermal hysteresis in nonstoichiometric alloys with giant magnetocaloric effect Ghorai, Sagar Clulow, Rebecca Cedervall, Johan Huang, Shuo Ericsson, Tore Häggström, Lennart Skini, Ridha Shtender, Vitalii Vitos, Levente Eriksson, Olle Scheibel, Franziska Skokov, Konstantin Gutfleisch, Oliver Sahlberg, Martin Svedlindh, Peter Materials Science Applied Physics The non-stoichiometric Fe$_2$P-type (FeMnP$_{0.5}$Si$_{0.5}$)$_{1-x}$(FeV)$_{x}$ alloys ( $x=0, 0.01$, $0.02$, and $0.03$) have been investigated as potential candidates for magnetic refrigeration near room temperature. The magnetic ordering temperature decreases with increasing FeV concentration, $x$, which can be ascribed to decreased ferromagnetic coupling strength between the magnetic atoms. The strong magnetoelastic coupling in these alloys results in large values of the isothermal entropy change ($ΔS_M$); $15.7$ J/kgK, at $2$ T magnetic field for the $x = 0$ alloy. $ΔS_M$ decreases with increasing $x$. Results from M{ö}ssbauer spectroscopy reveal that the average hyperfine field (in the ferromagnetic state) and average center shift (in the paramagnetic state) have the same decreasing trend as $ΔS_M$. The thermal hysteresis ($ΔT_{hyst}$) of the magnetic phase transition decreases with increasing $x$, while the mechanical stability of the alloys improves due to the reduced lattice volume change across the magnetoelastic phase transition. The adiabatic temperature change $ΔT_{ad}$, which highly depends on $ΔT_{hyst}$, is $1.7$ K at $1.9$ T applied field for the $x = 0.02$ alloy. |
| title | Design of thermal hysteresis in nonstoichiometric alloys with giant magnetocaloric effect |
| topic | Materials Science Applied Physics |
| url | https://arxiv.org/abs/2410.01747 |