期刊
PHYSICAL REVIEW B
卷 78, 期 13, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.78.134205
关键词
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资金
- NSF [DMR-0405682]
- U.S. Department of Energy
- National Science Foundation
- State of Florida
A potentially new kind of glass transition may exist among phase-separated regions in La0.215Pr0.41Ca3/8MnO3. We have observed a very large damping of ultrasonic waves in the dynamically phase-segregated state of this material. This damping is connected to the motion of structural interfaces at megahertz frequencies, which is a much faster time scale than that of magnetic relaxation effects. At lower temperatures, the dynamics of the phase-separated state freeze at the glass transition. Our observations link the onset of this freezing to a sudden decrease in mobility of interfaces between structurally dissimilar phase-segregated regions.
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