Magnetic and electronic inhomogeneity in Sm$_{1-x}$Eu$_x$B$_6$
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arXiv
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| Autores principales: | , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| author | Crivillero, M. Victoria Ale Rosa, Priscila F. S. Fisk, Z. Müller, J. Schlottmann, P. Wirth, S. |
| author_facet | Crivillero, M. Victoria Ale Rosa, Priscila F. S. Fisk, Z. Müller, J. Schlottmann, P. Wirth, S. |
| contents | While SmB$_6$ attracts attention as a possible topological Kondo insulator, EuB$_6$ is known to host magnetic polarons that give rise to large magnetoresistive effects above its ferromagnetic order transition. Here we investigate single crystals of Sm$_{1-x}$Eu$_x$B$_6$ by magnetic and magnetotransport measurements to explore a possible interplay of these two intriguing phenomena, with focus on the Eu-rich substitutions. Sm$_{0.01}$Eu$_{0.99}$B$_6$ exhibits generally similar behavior as EuB$_6$. Interestingly, Sm$_{0.05}$Eu$_{0.95}$B$_6$ combines global antiferromagnetic order with local polaron formation. A pronounced hysteresis is found in the magnetoresistance of Sm$_{0.1}$Eu$_{0.9}$B$_6$ at low temperature ($T=$ 1.9 K) and applied magnetic fields between 2.3 $-$ 3.6 T. The latter is in agreement with a phenomenological model that predicts the stabilization of ferromagnetic polarons with increasing magnetic field within materials with global antiferromagnetic order. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2410_23199 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Magnetic and electronic inhomogeneity in Sm$_{1-x}$Eu$_x$B$_6$ Crivillero, M. Victoria Ale Rosa, Priscila F. S. Fisk, Z. Müller, J. Schlottmann, P. Wirth, S. Strongly Correlated Electrons While SmB$_6$ attracts attention as a possible topological Kondo insulator, EuB$_6$ is known to host magnetic polarons that give rise to large magnetoresistive effects above its ferromagnetic order transition. Here we investigate single crystals of Sm$_{1-x}$Eu$_x$B$_6$ by magnetic and magnetotransport measurements to explore a possible interplay of these two intriguing phenomena, with focus on the Eu-rich substitutions. Sm$_{0.01}$Eu$_{0.99}$B$_6$ exhibits generally similar behavior as EuB$_6$. Interestingly, Sm$_{0.05}$Eu$_{0.95}$B$_6$ combines global antiferromagnetic order with local polaron formation. A pronounced hysteresis is found in the magnetoresistance of Sm$_{0.1}$Eu$_{0.9}$B$_6$ at low temperature ($T=$ 1.9 K) and applied magnetic fields between 2.3 $-$ 3.6 T. The latter is in agreement with a phenomenological model that predicts the stabilization of ferromagnetic polarons with increasing magnetic field within materials with global antiferromagnetic order. |
| title | Magnetic and electronic inhomogeneity in Sm$_{1-x}$Eu$_x$B$_6$ |
| topic | Strongly Correlated Electrons |
| url | https://arxiv.org/abs/2410.23199 |