Current-induced persistent magnetization in a relaxorlike manganite

Details Current-induced persistent magnetization in a relaxorlike manganite Current-induced persistent magnetization in a relaxorlike manganite

2008-03-27

arxiv.org/abs/0803.3922v1

Appl. Phys. Lett. 92, 102514 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 3 figures

Scientific paper

10.1063/1.2897299

A single crystal of 7% Fe-doped (La$_{0.7}$Pr$_{0.3}$)$_{0.65}$Ca$_{0.35}$MnO$_3$ shows up as a typical relaxor ferromagnet, where ferromagnetic metallic and charge-orbital-ordered insulating clusters coexist with controllable volume fraction by external stimuli. There, the persistent ferromagnetic metallic state can be produced by an electric-current excitation as the filamentary region, the magnetization in which is increased by ~0.4$\mu_{\rm B}$ per Mn. A clear distinction from the current heating effect in a magnetic field, which conversely leads to a decrease in ferromagnetic fraction, enables us to bi-directionally switch both the magnetization and resistance by applying the voltages with different magnitudes.

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