Field-induced structural changes in Ca3Ru2O7

• Published in: Physica. B, Condensed matter Vol. 403; no. 5-9; pp. 1577 - 1578
• Main Authors: NELSON, C. S, MO, H, BOHNENBUCK, B, STREMPFER, J, KIKUGAWA, N, IKEDA, S. I, YOSHIDA, Y
• Format: Conference Proceeding Journal Article
• Language: English
• Published: Amsterdam Elsevier 01-04-2008
• Subjects: Condensed matter: electronic structure, electrical, magnetic, and optical properties; Exact sciences and technology; Magnetic properties and materials; Physics; Metamagnetism; Degrees of freedom; X-ray scattering; Ruthenates; Ground states; Polarized spin; Phase transformations; Metal-insulator transition; Magnetic field effects; Calcium compounds; Spin reorientation; Lattice parameters
• ISSN: 0921-4526; 1873-2135
• DOI: 10.1016/j.physb.2007.10.198

We report X-ray scattering studies of the c-axis lattice parameter in Ca3Ru2O7 as a function of temperature and magnetic field, for B || the ground state easy (b) axis. The step-like, 0.1% change coincides in zero field with a spin reorientation and a metal-insulator transition, at Tm-iapprox 48K, and shifts to a lower temperature upon application of magnetic field. At temperatures well below Tm-i, negligible change in the c-axis lattice parameter is observed at the metamagnetic transition to the spin-polarized phase, at Bcapprox 6T, which indicates that this transition does not couple to the lattice degree of freedom.