Modulation of Electric Current on Photoinduced Spin-Disorder in a Manganite Film

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	LIU Xiao-Jun

关键词 ： 75.47.Lx, 75.90.+w, 75.47.-m

Abstract： We investigate the photoinduced resistance change (Δ R/R) in a La_0.6Sr_0.4MnO₃ film (T_c\sim 325K) at different applied dc currents I (0.1--2.0mA) at 295K. At I = 0.1mA, we have found a significant photoinduced ΔR/R～17% under photo-irradiation at excitation energy E_exc = 3.05eV and pump power P_pump = 2.5mJ/cm², which has been ascribed to the photo-excited down-spin e_g carriers and hence the spin-disorder in the ferromagnetic metallic state. With increasing applied electric current to 2.0mA, the magnitude of the photoinduced ΔR/R is reduced to 3%, which may be attributed to current-induced ordering of the localized spins.

Key words： 75.47.Lx 75.90.+w 75.47.-m

出版日期: 2005-10-01

:	75.47.Lx	(Magnetic oxides)
	75.90.+w	(Other topics in magnetic properties and materials)
	75.47.-m	(Magnetotransport phenomena; materials for magnetotransport)

引用本文:

LIU Xiao-Jun. Modulation of Electric Current on Photoinduced Spin-Disorder in a Manganite Film[J]. 中国物理快报, 2005, 22(10): 2666-2669.
LIU Xiao-Jun. Modulation of Electric Current on Photoinduced Spin-Disorder in a Manganite Film. Chin. Phys. Lett., 2005, 22(10): 2666-2669.

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https://cpl.iphy.ac.cn/CN/ 或 https://cpl.iphy.ac.cn/CN/Y2005/V22/I10/2666