Equilibrium tuned by a magnetic field in phase separated manganite

Details Equilibrium tuned by a magnetic field in phase separated manganite Equilibrium tuned by a magnetic field in phase separated manganite

2008-07-16

arxiv.org/abs/0807.2631v1

Physics

Condensed Matter

Strongly Correlated Electrons

13 pages, 5 figures. Submited to Journal of Physics: Condensed Matter

Scientific paper

10.1088/0953-8984/20/34/345204

We present magnetic and transport measurements on La5/8-yPryCa3/8MnO3 with y = 0.3, a manganite compound exhibiting intrinsic multiphase coexistence of sub-micrometric ferromagnetic and antiferromagnetic charge ordered regions. Time relaxation effects between 60 and 120K, and the obtained magnetic and resistive viscosities, unveils the dynamic nature of the phase separated state. An experimental procedure based on the derivative of the time relaxation after the application and removal of a magnetic field enables the determination of the otherwise unreachable equilibrium state of the phase separated system. With this procedure the equilibrium phase fraction for zero field as a function of temperature is obtained. The presented results allow a correlation between the distance of the system to the equilibrium state and its relaxation behavior.

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