Session Z36: Focus Session: Bulk Properties of Complex Oxides -- 4d and 5d Systems
11:15 AM–2:15 PM, Friday, March 19, 2010
Room: E146
Sponsoring Units:
DMP GMAG
Chair: Rongying Jin, Louisiana State University
Abstract ID: BAPS.2010.MAR.Z36.15
Abstract: Z36.00015 : Magnetic Superstructure and Metal-Insulator Transition in Mn-Substituted Sr$_3$Ru$_2$O$_7$
2:03 PM–2:15 PM
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Abstract
Authors:
M.A. Hossain
(Univ. of B.C. and SIMES, SLAC, Stanford University)
B. Bohnenbuck
(MPI, Stuttgart)
Y.-D. Chuang
(ALS, Lawrence Berkeley National Laboratory)
J. Geck
(Univ. of British Columbia)
Y. Tokura
(University of Tokyo)
Y. Yoshida
(AIST, Japan)
Z. Hussain
(ALS, Lawrence Berkeley National Laboratory)
B. Keimer
(MPI, Stuttgart)
G.A. Sawatzky
(Univ. of British Columbia)
A. Damascelli
(Univ. of British Columbia)
We present a temperature-dependent resonant elastic soft x-ray scattering (REXS) study of the metal-insulator transition in Sr$_3$(Ru$_{1-x}$Mn$_x$)$_2$O$_7$, performed at both Ru and Mn $L$-edges. Resonant magnetic superstructure reflections, which indicate an incipient instability of the parent compound, are detected below the transition. Based on modelling of the REXS intensity from randomly distributed Mn impurities, we establish the inhomogeneous nature of the metal-insulator transition, with an effective percolation threshold corresponding to an anomalously low $x\sim 0.05$ Mn substitution. In collaboration with A.G. Cruz Gonzalez, J.D. Denlinger (Berkeley Lab), I. Zegkinoglou, M.W. Haverkort (MPI, Stuttgart), I.S. Elfimov, D.G. Hawthorn (UBC), R. Mathieu, S. Satow, H. Takagi (Tokyo), H.-H. Wu and C. Sch\"{u}\ss ler-Langeheine (Cologne).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2010.MAR.Z36.15