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Magnetoelastic coupling and phases in the skyrmion lattice magnet Gd2PdSi3 discovered by high-resolution dilatometry

We report detailed thermodynamic studies on high-quality single crystals of the centrosymmetric skyrmion-hosting intermetallic Gd2PdSi3 by means of high-resolution capacitance dilatometry in fields up to 15 T which are complemented by specific heat and magnetization studies. Our dilatometric measure...

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Bibliographic Details
Main Authors: Spachmann, Sven (Author) , Elghandour, Ahmed (Author) , Frontzek, M. (Author) , Löser, W. (Author) , Klingeler, Rüdiger (Author)
Format: Article (Journal)
Language:English
Published: 21 May 2021
In: Physical review
Year: 2021, Volume: 103, Issue: 18, Pages: 1-9
ISSN:2469-9969
DOI:10.1103/PhysRevB.103.184424
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevB.103.184424
Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevB.103.184424
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Author Notes:S. Spachmann, A. Elghandour, M. Frontzek, W. Löser, and R. Klingeler
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Summary:We report detailed thermodynamic studies on high-quality single crystals of the centrosymmetric skyrmion-hosting intermetallic Gd2PdSi3 by means of high-resolution capacitance dilatometry in fields up to 15 T which are complemented by specific heat and magnetization studies. Our dilatometric measurements show magnetoelastic effects associated with antiferromagnetic order at TN1=22.3 K and TN2=19.7 K, as well as strong field effects in an applied magnetic field of 15 T up to 200 K (150 K) for B∥c (B∥a*, i.e., B⊥c). The data allow us to complete the magnetic phase diagram, including a feature at T∗≈13K below which an additional degree of freedom becomes relevant. The magnetic B vs T phase diagram for the a* axis is also reported. Grüneisen analysis shows the onset of magnetic contributions around 60 K, i.e., well above TN1. Uniaxial pressure dependencies of opposite signs, −1.3 and 0.3 K/GPa, are extracted for the out-of-plane and in-plane directions at TN1. For T∗ we obtain ∂T∗/∂pc=1.4 K/GPa. In particular we elucidate thermodynamic properties of the recently discovered skyrmion lattice phase and show that it is strongly enhanced by uniaxial pressure.
Item Description:Im Text sind "2" und "3" tiefgestellt
Gesehen am 28.02.2022
Physical Description:Online Resource
ISSN:2469-9969
DOI:10.1103/PhysRevB.103.184424

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