Giant Positive Magnetoresistance in Grain-Oriented CxCo1-x Alloys
-
Abstract
The grain-oriented CxCo1-x (x = 0.9, 0.5) samples were fabricated by the hot-pressing method. The microstrucre was observed by an x-ray diffractometer and a scanning electron microscope. The resistance against the applied magnetic field was measured by a standard four-point probe method at different temperatures. The magnetoresistance and the magnetization ratio were studied as a function of magnetic field in the range of -1800 kA/m-1800 kA/m at different temperatures from 50 K to 300 K. The magnetoresistance of grain-oriented CxCo1-x is positive. The maximum positive MR of 98% at 50 K and 34% at 300 K was obtained under 1800 kA/m magnetic field in the C0.9Co0.1 sample. -
References
-
Related Articles
[1] ZHANG Xiao-Qiang, WANG Chang-Shun, LU Guo-Yuan, HE Ting-Chao. Third-Order Nonlinear Optical Properties of a Series of Polythiophenes [J]. Chin. Phys. Lett., 2010, 27(7): 074201. doi: 10.1088/0256-307X/27/7/074201 [2] WANG Cun-Xiu, FU Shi-Shu, Gu Yu-Zong. Large Third-Order Optical Nonlinearity of Cadmium Sulphide Nanoparticles Embedded in Polymer Thin Films [J]. Chin. Phys. Lett., 2009, 26(9): 097804. doi: 10.1088/0256-307X/26/9/097804 [3] PEI Song-Hao, ZHAO Da-Peng, ZHANG Wei, ZHENG Wen-Qi, WANG Xing-Qiao, PENG Wei-Xian, SHI Guang, SONG Ying-Lin. Third-Order Optical Nonlinearity in Novel Porphyrin Dimers [J]. Chin. Phys. Lett., 2008, 25(12): 4292-4295. [4] CHU Sai-Sai, WANG Shu-Feng, TAO Hai-Zheng, WANG Zhen-Wei, YANG Hong, LIN Chang-Gui, GONG Qi-Huang, ZHAO Xiu-Jian. Large and Ultrafast Third-Order Nonlinear Optical Properties of Ge-S Based Chalcogenide Glasses [J]. Chin. Phys. Lett., 2007, 24(3): 727-729. [5] FENG Lin, WANG Yan-Ling, REN Quan, ZHGNG Guang-Hui, YANG Hong-Liang, SUN Xiang-Bing. Third-Order Optical Nonlinearity of a Novel Material: (Tetramethylammonium)bis(1,3-dithiole-2-thione-4,5-dithiolato) Copper [J]. Chin. Phys. Lett., 2005, 22(11): 2834-2836. [6] LI Zhong-Yu, JIN Zhao-Hui, KASATANI Kazuo, OKAMOTO Hiroaki. Large Third-Order Optical Nonlinearity and Fast Response of a Squarylium Dye [J]. Chin. Phys. Lett., 2005, 22(9): 2282-2285. [7] FU Gang, Kazuo Kasatani, Hiroaki Okamoto, Shunsuke Takenaka. Large and Fast Resonant Third-Order Optical Nonlinearities of Silicon 2,3-Naphthalocyanine Bi (trihexylsilyloxide) [J]. Chin. Phys. Lett., 2005, 22(7): 1687-1690. [8] ZHANG Chun-Feng, YOU Guan-Jun, DONG Zhi-Wei, LIU Ye, MA Guo-Hong, QIAN Shi-Xiong. Off-Resonant Third-Order Optical Nonlinearity of an Ag:TiO2 Composite Film [J]. Chin. Phys. Lett., 2005, 22(2): 475-477. [9] WANG Wei-Tian, YANG Guang, DUAN Ping, ZHOU Yue-Liang, CHEN Zheng-Hao. Fe-doped BaTiO3 Thin Films with Large Third-Order Nonlinear Optical Susceptibility [J]. Chin. Phys. Lett., 2002, 19(8): 1122-1124. [10] YANG Guang, WANG Huan-Hua, TAN Guo-Tai, JIANG An-Quan, ZHOU Yue-Liang, YANG Guo-Zhen, CHEN Zheng-Hao. Large Third-Order Nonlinear Optical Susceptibility of Rh-DopedBaTiO3 Thin Films Prepared by Pulsed Laser Deposition [J]. Chin. Phys. Lett., 2001, 18(12): 1598-1600.
DownLoad: