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Condensed Matter
Volume 9
Issue 4
10.3390/condmat9040055
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Article

Magnetic and Electronic Inhomogeneity in Sm1−xEuxB6

by
M. Victoria Ale Crivillero
1,
Priscila F. S. Rosa
2,
Zachary Fisk
3,
Jens Müller
4,
Pedro Schlottmann
5 and
Steffen Wirth
1,*
1
Max Planck Institute for Chemical Physics of Solids, Nöthnitzer Straße 40, 01187 Dresden, Germany
2
Los Alamos National Laboratory, Los Alamos, NM 87545, USA
3
Department of Physics and Astronomy, UC Irvine, Irvine, CA 92697, USA
4
Institute of Physics, Goethe-University Frankfurt, 60438 Frankfurt (M), Germany
5
Department of Physics, Florida State University, Tallahassee, FL 32306, USA
*
Author to whom correspondence should be addressed.
Condens. Matter 2024, 9(4), 55; https://doi.org/10.3390/condmat9040055
Submission received: 30 October 2024 / Revised: 10 December 2024 / Accepted: 11 December 2024 / Published: 13 December 2024
(This article belongs to the Special Issue Superstripes Physics, 3rd Edition)
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Abstract

While SmB6 attracts attention as a possible topological Kondo insulator, EuB6 is known to host magnetic polarons that give rise to large magnetoresistive effects above its ferromagnetic order transition. Here, we investigate single crystals of Sm1−xEuxB6 by magnetic and magnetotransport measurements to explore a possible interplay of these two intriguing phenomena, with a focus on the Eu-rich substitutions. Sm0.01Eu0.99B6 exhibits generally similar behavior as EuB6. Interestingly, Sm0.05Eu0.95B6 combines a global antiferromagnetic order with local polaron formation. A pronounced hysteresis is found in the magnetoresistance of Sm0.1Eu0.9B6 at low temperature (T= 1.9 K) and applied magnetic fields between 2.3 and 3.6 T. The latter is in agreement with a phenomenological model that predicts the stabilization of ferromagnetic polarons with an increasing magnetic field within materials with a global antiferromagnetic order.
Keywords: magnetic polarons; phase competition; magnetoresistance magnetic polarons; phase competition; magnetoresistance

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MDPI and ACS Style

Ale Crivillero, M.V.; Rosa, P.F.S.; Fisk, Z.; Müller, J.; Schlottmann, P.; Wirth, S. Magnetic and Electronic Inhomogeneity in Sm1−xEuxB6. Condens. Matter 2024, 9, 55. https://doi.org/10.3390/condmat9040055

AMA Style

Ale Crivillero MV, Rosa PFS, Fisk Z, Müller J, Schlottmann P, Wirth S. Magnetic and Electronic Inhomogeneity in Sm1−xEuxB6. Condensed Matter. 2024; 9(4):55. https://doi.org/10.3390/condmat9040055

Chicago/Turabian Style

Ale Crivillero, M. Victoria, Priscila F. S. Rosa, Zachary Fisk, Jens Müller, Pedro Schlottmann, and Steffen Wirth. 2024. "Magnetic and Electronic Inhomogeneity in Sm1−xEuxB6" Condensed Matter 9, no. 4: 55. https://doi.org/10.3390/condmat9040055

APA Style

Ale Crivillero, M. V., Rosa, P. F. S., Fisk, Z., Müller, J., Schlottmann, P., & Wirth, S. (2024). Magnetic and Electronic Inhomogeneity in Sm1−xEuxB6. Condensed Matter, 9(4), 55. https://doi.org/10.3390/condmat9040055

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