Magnetic phase diagram, magnetotransport and inverse magnetocaloric effect in the noncollinear antiferromagnet Mn5Si3

•Single crystals of the noncollinear magnet Mn5Si3 are synthesized Cu using flux growth, obtaining long needle-like samples.•Anomalous Hall effectand inverse magnetocarloric effect are observed in the long needles.•The phase diagram shows a magnetic phase not observed in previous measurements.•The s...

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Published in:Journal of magnetism and magnetic materials 2019-11, Vol.489, p.165451, Article 165451
Main Authors: Luccas, Roberto F., Sánchez-Santolino, Gabriel, Correa-Orellana, Alex, Mompean, Federico J., García-Hernández, Mar, Suderow, Hermann
Format: Article
Language:English
Subjects:
Antiferromagnetism
Electromagnetism
Hall effect
Inclusions
Magnetism
Magnetoresistance
Magnetoresistivity
Phase diagrams
Single crystals
Variations
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Summary:•Single crystals of the noncollinear magnet Mn5Si3 are synthesized Cu using flux growth, obtaining long needle-like samples.•Anomalous Hall effectand inverse magnetocarloric effect are observed in the long needles.•The phase diagram shows a magnetic phase not observed in previous measurements.•The strength of magnetic fluctuations might make this material susceptible to modifications in the magnetic order, induced here by nanosized Cu inclusions during crystal growth. The antiferromagnet Mn5Si3 has recently attracted attention because a noncollinear spin arrangement has been shown to produce a topological anomalous Hall effect and an inverse magnetocaloric effect. Here we synthesize single crystals of Mn5Si3 using flux growth. We determine the phase diagram through magnetization and measure the magnetoresistance and the Hall effect. We find the collinear and noncollinear antiferromagnetic phases at low temperatures and, in addition, a third magnetic phase, in between the two antiferromagnetic phases. The latter magnetic phase might be caused by strain produced by Cu inclusions. This suggests that fluctuations of the mixed character magnetic ordering in this compound can be easily quenched by stress.
ISSN:0304-8853
1873-4766
DOI:10.1016/j.jmmm.2019.165451