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Phys. Rev. B 75, 212403 (2007) [4 pages]

Spin-charge-lattice coupling near the metal-insulator transition in Ca3Ru2O7

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C. S. Nelson and H. Mo
National Synchrotron Light Source, Brookhaven National Laboratory, Upton, New York 11973-5000, USA

B. Bohnenbuck
Max-Planck-Institut für Festkörperforschung, Heisenbergstraße 1, D-70569 Stuttgart, Germany

J. Strempfer
Hamburger Synchrotronstrahlungslabor HASYLAB at Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22603 Hamburg, Germany

N. Kikugawa
National Institute for Materials Science, Tsukuba, Ibaraki 305-0047, Japan

S. I. Ikeda and Y. Yoshida
National Institute of Advanced Industrial Science and Technology, Tsukuba, Ibaraki 305-8568, Japan

Received 4 May 2007; published 6 June 2007

We report x-ray scattering studies of the c-axis lattice parameter in Ca3Ru2O7 as a function of temperature and magnetic field. These structural studies complement published transport and magnetization data, and therefore elucidate the spin-charge-lattice coupling near the metal-insulator transition. Strong anisotropy of the structural change for field applied along orthogonal in-plane directions is observed. Competition between a spin-polarized phase that does not couple to the lattice and an antiferromagnetic metallic phase that does gives rise to a rich behavior for B‖b.

© 2007 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevB.75.212403
DOI:
10.1103/PhysRevB.75.212403
PACS:
75.30.Kz, 61.10.Eq, 71.30.+h, 75.80.+q
 
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