Anisotropy of the low-temperature magnetostriction of Sr3Ru2O7

Abstract

We use high-resolution capacitive dilatometry to study the low-temperature linear magnetostriction of the bilayer ruthenate Sr${}_3$Ru${}_2$O${}_7$ as a function of magnetic field applied perpendicular to the ruthenium-oxide planes ($B\parallel c$). The relative length change $\Delta L(B)/L$ is detected either parallel or perpendicular to the c-axis close to the metamagnetic region near B=8 T. In both cases, clear peaks in the coefficient $\lambda (B)=d(\Delta L/L)/dB$ at three subsequent metamagnetic transitions are observed. For $\Delta L\perp c$, the third transition at 8.1 T bifurcates at temperatures below 0.5 K. This is ascribed to the effect of an in-plane uniaxial pressure of about 15 bar, unavoidable in the dilatometer, which breaks the original fourfold in-plane symmetry.

3 pages, 3 Figures, Manuscript for Proceedings of the International Conference on Quantum Criticality and Novel Phases (QCNP09, Dresden)

References in corpus (5)

• Formation of a Nematic Fluid at High Fields in Sr3Ru2O7
• Angular dependence of the magnetic susceptibility in the itinerant metamagnet Sr3Ru2O7
• Multiple first-order metamagnetic transitions and quantum oscillations in ultrapure
• Metamagnetic quantum criticality in Sr3Ru2O7 studied by thermal expansion
• Investigation into the Itinerant metamagnetism of Sr3Ru2O7 for the Field Parallel to the Ruthenium Oxygen Planes

Cited by in corpus (3)

• Symmetry-breaking lattice distortion in Sr_3Ru_2O_7
• Field evolution of the spin-liquid candidate YbMgGaO${}_4$
• Electronic nematicity and its relation to quantum criticality in Sr_3Ru_2O_7 studied by thermal expansion