Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10653116 | Solid State Communications | 2005 | 5 Pages |
Abstract
Cr-doped manganites Sr0.9Ce0.1Mn1âyCryO3 (y=0, 0.05, and 0.10) have been systematically investigated by X-ray, magnetic, transport, and elastic properties measurements. For parent compound Sr0.9Ce0.1MnO3, it undergoes a metal-insulator (M-I) transition at 318Â K, which is suggested to originate from a first-order structural transition accompanied by Jahn-Teller (JT) transition. With increasing Cr doping content, the JT transition temperature decreases. The Cr doping suppresses the antiferromagnetic (AFM) state and makes the system spin-glass (SG) behavior at low temperatures. In the vicinity of JT transition temperatures, the softening of Young's modulus originating from the coupling of the orbital (quadrupolar) moment of the eg orbital of Mn3+ ion to the elastic strain has been observed. The anomalous Young's modulus properties imply the electron-phonon coupling due to the JT effect may play an important role in the system.
Related Topics
Physical Sciences and Engineering
Materials Science
Materials Science (General)
Authors
W.J. Lu, B.C. Zhao, R. Ang, W.H. Song, J.J. Du, Y.P. Sun,