Direct observation of photoinduced magnetization in a relaxor ferromagnet

Okimoto, Y.; Ogimoto, Y.; Matsubara, M.; Tomioka, Y.; Kageyama, T.; Hasegawa, T.; Koinuma, H.; Kawasaki, M.; Tokura, Y.
February 2002
Applied Physics Letters;2/11/2002, Vol. 80 Issue 6, p1031
Academic Journal
Persistent ferromagnetic magnetization (M) as large as 0.6 μ[sub B] per Mn site can be induced by irradiating visible laser pulses on a thin film of 1% Cr-doped Pr[sub 0.5]Ca[sub 0.5]MnO[sub 3]. The enhancement of M upon the photoexcitation was also confirmed by the scanning superconducting quantum interference device microscope as an increase of magnetic field from ferromagnetic domains. The observed photoinduced transition from a metastable charge/orbital ordered state into a ferromagnetic one is likely to be assisted by the microscopic phase separation characteristic of such a relaxor ferromagnet as the present Cr-doped manganite. © 2002 American Institute of Physics.


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