%0 Journal Article
%T Fabrication and characterization of La2/3Ca1/3MnO3/Eu2CuO4/ La2/3Ca1/3MnO3 magnetic tunneling junctions<br>La2/3Ca1/3MnO3/Eu2CuO4/La2/3Ca1/3MnO3磁性隧道结的制备与表征
%A Tang Wei-Hu
%A Li Pei-Gang
%A Li L H
%A Gao J
%A <br>唐为华
%A 李培刚
%A L. H. Li
%A J. Gao
%J 物理学报
%D 2005
%I 
%X Magnetic tunneling junctions of La2/3Ca1/3MnO3/Eu2CuO4/ La2/3Ca1/3MnO3 have been fabricated by RF-magnetron sputtering, photolithography and ion beam etching. Tunneling effect was observed in these junctions by measuring their I-V curves. Interestingly, a discontinuity was observed in the I-V curves below the metal-insulator transition temperature (Tp) of La2/3Ca1/3MnO3 By changing temperatures, the discontinuity in I-V curves happens at the same voltage of 209mV, but starts at different currents. The discontinuity starting current (Ic) decreases with increasing temperature. There is a hysteresis near the discontinuity when the current increases and decreases. The discontinuity in I-V curves could indicate a novel switching process. This switching phenomenon occurs only in the ferromagnetic metal state and strongly suggesting a magnetic related effect. The physics of the switching process has not been understood yet, but it could be of interest for potential applications in spintronic devices.
%K colossal magnetoresistance
%K magnetic tunneling junction
%K switching effect<br>庞磁电阻，
%K 磁性隧道结，
%K 开关效应
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=909D4FEE233835CC&yid=2DD7160C83D0ACED&vid=318E4CC20AED4940&iid=CA4FD0336C81A37A&sid=6490F0E20C4B41AD&eid=E39A3F4E3A67639B&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=19