Magnetic field induced modification of a first-order ferromagnetic transition in Eu2In
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arXiv
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2026
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| author | Kumar, Ajay Biswas, Anis Tyson, Trevor A. Haskel, Daniel Pollock, Christopher J. Mudryk, Yaroslav |
| author_facet | Kumar, Ajay Biswas, Anis Tyson, Trevor A. Haskel, Daniel Pollock, Christopher J. Mudryk, Yaroslav |
| contents | We present a comprehensive study of the temperature- and magnetic-field-dependent magnetization, specific heat, and local crystal structure across the first-order ferromagnetic-paramagnetic transition in Eu$_2$In. Anomalies in the magnetocaloric response are observed near $H \approx 25$~kOe, including changes in field scaling of magnetic entropy, local entropy exponent, and universal master curve, which suggest an apparent weakening of the first-order character of the transition. However, quantitative analysis of the magnetocaloric parameters together with modified Arrott plots demonstrates that the transition remains first order up to at least 70~kOe. Specific-heat measurements reveal a field-induced splitting of the sharp zero-field anomaly into a doublet, providing a natural explanation for the change in the magnetocaloric response. Magnetic field dependent extended x-ray absorption fine structure (EXAFS) measurements show no detectable field-induced changes in the local coordination environment of Eu. We therefore attribute these observations to a magnetic field induced two-step transition process in Eu$_2$In. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2603_27390 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Magnetic field induced modification of a first-order ferromagnetic transition in Eu2In Kumar, Ajay Biswas, Anis Tyson, Trevor A. Haskel, Daniel Pollock, Christopher J. Mudryk, Yaroslav Applied Physics We present a comprehensive study of the temperature- and magnetic-field-dependent magnetization, specific heat, and local crystal structure across the first-order ferromagnetic-paramagnetic transition in Eu$_2$In. Anomalies in the magnetocaloric response are observed near $H \approx 25$~kOe, including changes in field scaling of magnetic entropy, local entropy exponent, and universal master curve, which suggest an apparent weakening of the first-order character of the transition. However, quantitative analysis of the magnetocaloric parameters together with modified Arrott plots demonstrates that the transition remains first order up to at least 70~kOe. Specific-heat measurements reveal a field-induced splitting of the sharp zero-field anomaly into a doublet, providing a natural explanation for the change in the magnetocaloric response. Magnetic field dependent extended x-ray absorption fine structure (EXAFS) measurements show no detectable field-induced changes in the local coordination environment of Eu. We therefore attribute these observations to a magnetic field induced two-step transition process in Eu$_2$In. |
| title | Magnetic field induced modification of a first-order ferromagnetic transition in Eu2In |
| topic | Applied Physics |
| url | https://arxiv.org/abs/2603.27390 |