Pressure induced isostructural phase transition in biskyrmion host hexagonal MnNiGa

Abstract

Magnetic skyrmions are vortex-like spin textures, which can be manipulated by external stress or pressure via magnetoelastic effects. Here, we present the observation of isostructural phase transition in a biskyrmion host hexagonal MnNiGa at a pressure around 4 GPa using pressure-dependent synchrotron x-ray powder diffraction (XRD) data analysis. Our XRD data reveals anisotropic compression behavior with pressure with different compression rates of the a-axis in the basal plane and the c-axis in the prismatic plane. However, the hexagonal symmetry remains unchanged for pressure up to 14 GPa. Fitting of unit cell volume with pressure using a second-order Birch-Murnagan equation of state reveals that the data to fall into two distinct curves for those above and below 4 GPa. The present study contributes to the understanding of crystal structure with the application of hydrostatic pressure in the biskyrmion host MnNiGa, wherein the skyrmion textures can be manipulated by pressure due to their magnetoelastic character.

References in corpus (14)

• Skyrmion Lattice in a Chiral Magnet
• Spin Transfer Torques in MnSi at Ultra-low Current Densities
• Emergent electrodynamics of skyrmions in a chiral magnet
• The 2020 Skyrmionics Roadmap
• A centrosymmetric hexagonal magnet with superstable biskyrmion magnetic nanodomains in a wide temperature range of 100K to 340K
• Field induced topological Hall effect in non-coplanar triangular antiferromagnetic geometry of Mn3Sn
• Switching of the topologically trivial and non-trivial quantum phase transitions in compressed 1T-TiTe2: Experiments and Theory
• Uniaxial pressure dependence of magnetic order in MnSi
• Anisotropic compression in the high pressure regime of pure and Cr-doped vanadium dioxide
• Room-temperature skyrmion phase in bulk Cu2OSeO3 under high pressures
• Unified Theory of Magnetoelastic Effects in B20 chiral magnets
• Skyrmions and spirals in MnSi under hydrostatic pressure
• Robust edge states in magnetic domain-wall racetrack
• Tuning the structure of Skyrmion lattice system Cu2OSeO3 under pressure