Zobrazeno 1 - 10
of 71
pro vyhledávání: '"Liezhao, Cao"'
Publikováno v:
Journal of Materials Research. 26:561-566
Transport properties in the a-b plane of Nd0.75Sr1.25CoO4 thin film as fabricated via a pulsed laser deposition technique have been investigated by means of measurements of resistivity and thermopower, respectively, in the temperature ranges of 76-30
Autor:
Xiaoguang Li, Zongqiang Pang, Huiyan Wu, Z. M. Lv, Shengli Huang, Liezhao Cao, Keqing Ruan, Zhaochuan Shen
Publikováno v:
Solid State Communications. 141:150-155
Molecular vibrations of the polycrystalline Nd2−xSrxCoO4 are systematically characterized by powdered x-ray diffraction, Raman scattering and infrared spectra at different dopings as well as at different temperatures. Structural refinements reveal
Publikováno v:
Solid State Communications. 141:198-202
Systematic studies of structural, magnetic, electronic, and elastic properties have been performed for the electron-doped manganite Sr0.95Ce0.05MnO3. The results show that light doping with Ce in place of Sr in SrMnO3 could stabilize the perovskite-t
Publikováno v:
Solid State Communications. 140:340-344
The Ru-doped Ruddlesden–Popper (RP)-type compounds Sr3Fe2−xRuxO7 ( x = 0 , 0.3, 0.6, 1.0 and 1.4) were synthesized and checked by X-ray diffraction (XRD). The doping dependencies of unit cell parameters, resistivity ( ρ – T ) and magnetization
Publikováno v:
Physica C: Superconductivity. 403:203-208
The thermopower of Sm 2− x Ce x CuO 4 single crystal ( x =0.15) and polycrystalline samples (0.06⩽ x ⩽0.21) has been measured. The positive slope in thermopower in the underdoped region emphasizes the existence of a high temperature regime abov
Autor:
P.C. Li, Zhe Chen, Yuan Hu, Mingde Li, H.S. Yang, Hai-Hu Wen, Y.Z Long, M. Yu, Zhengquan Li, Liezhao Cao, Yisheng Chai
Publikováno v:
Physica C: Superconductivity. 391:79-88
We report a study on the temperature dependence of thermoelectric power, dc susceptibility, and resistivity of Zn-doped La2CuO4+y, with changing cooling rates from 330 K. The antiferromagnetic (AF) transition temperature T-N is not changed with chang
Publikováno v:
Physica C: Superconductivity. 386:560-564
MgB 2 and Mg 0.93 Li 0.07 B 2 superconductors have been prepared by solid-state reaction. The temperature dependence of electrical resistivity in MgB 2 and Mg 0.93 Li 0.07 B 2 have been measured in magnetic field up to 14 T. They have almost the same
Autor:
Liezhao Cao, Yong Feng, Keqing Ruan, B.Q. Fu, Xiaoguang Li, C.F. Liu, Yue Zhao, Yuanwei Zhang, G. Yan, Liang Shi, Liangfu Zhou
Publikováno v:
Physica C: Superconductivity. 386:598-602
We have successfully fabricated mono- and multifilamentary MgB 2 wires and tapes with different sheathed metals such as Cu, Ta, NbZr and Fe by the powder-in-tube method. The phase compositions, microstructure features and superconducting properties a
Autor:
Pingxiang Zhang, Lian Zhou, Liezhao Cao, Xiaoguang Li, Xinkang Teng, Lifa Hu, Keqing Ruan, E. Mossonge, Yong Feng, André Sulpice, Chengshan Li, Jinrong Wang
Publikováno v:
Physica C: Superconductivity. 386:131-137
We have measured J c ( B , T ) mainly at 4.2 and 77 K under perpendicular external fields and parallel ones. The results make it possible to elucidate the critical state model theoretically and experimentally. In the present work, an attempt has been
Publikováno v:
Physica C: Superconductivity. 382:233-236
The synthesis of superconductor RuSr 2 GdCu 2 O 8 by common solid-state reaction is always accompanied by the formation of small amounts of ferromagnetic SrRuO 3 impurities. In this paper, we present a precursor method of pure RuSr 2 GdCu 2 O 8 prepa