Magnetoelastic Coupling and Phases in the Skyrmion Lattice Magnet Gd2PdSi3 Discovered by High-resolution Dilatometry

Abstract

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 Tup to 200 K (150 K) for B||c (B||a*, i.e. B perp c). The data allow us to complete the magneticphase diagram, including a new feature at T* approx 12 K below which a new degree of freedom becomesrelevant. For the first time, 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 sign, -1.3 K/GPa and 0.3 K/GPa, are extracted for the out-of-plane and in-plane directions at TN1. For T* we obtain dT*/dpc= 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.

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Cited by in corpus (25)

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• Magnetic Interactions of the Centrosymmetric Skyrmion Material Gd2PdSi3
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• Mean-field approach for skyrmion lattice in hexagonal frustrated antiferromagnets
• Rhombic skyrmion lattice coupled with orthorhombic structural distortion in EuAl${}_4$
• Spin excitation spectra in helimagnetic states: proper-screw, cycloid, vortex crystal, and hedgehog lattice
• Stabilization mechanisms of magnetic skyrmion crystal and multiple-$Q$ states based on momentum-resolved spin interactions
• Thermodynamic insights into the intricate magnetic phase diagram of EuAl${}_4$
• Kagome lattice promotes chiral spin fluctuations
• Skyrmion crystals in centrosymmetric triangular magnets under hexagonal and trigonal single-ion anisotropy
• Temperature-driven transition from skyrmion to bubble crystals in centrosymmetric itinerant magnets
• Square skyrmion crystal in centrosymmetric systems with locally inversion-asymmetric layers
• Ferroaxial moment induced by vortex spin texture
• Anisotropic skyrmion and multi-$q$ spin dynamics in centrosymmetric Gd${}_2$PdSi${}_3$
• Stability of Skyrmion Crystal Phase in Centrosymmetric Distorted Triangular-Lattice Antiferromagnets
• Skyrmion crystal under $D_{3h}$ point group: Role of out-of-plane Dzyaloshinskii-Moriya interaction
• Engineering a skyrmion crystal in ferromagnetic/antiferromagnetic bilayers free from the DM interaction
• Uniaxial Pressure Effects, Phase Diagram, and Tricritical Point in the Centrosymmetric Skyrmion Lattice Magnet GdRu${}_2$Si${}_2$
• Anisotropy of the magnetic-field-induced phase pocket in the non-Kramers doublet system PrIr${}_2$Zn${}_{20}$
• Anisotropic magnetism of polymorphic ErAl3
• Contrasting magnetic behavior in MnSc_2X_4 (X = S, Se) spinel compounds investigated by magnetoelastic studies
• Square skyrmion lattice in multiorbital $f$-electron systems
• Nematicity in LaFeAsO single crystals studied by elastoresistance, high-resolution thermal expansion and shear-modulus measurements
• Field-tunable quadruple-$Q$ states driven by momentum-space frustration