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| 71. |
Measurement of the spin-polarization of LaSrMnO |
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AIP Conference Proceedings,
Volume 483,
Issue 1,
1999,
Page 407-411
M. S. Osofsky,
B. Nadgorny,
R. J. Soulen,
P. Broussard,
M. Rubinstein,
J. Byers,
G. Laprade,
Y. M. Mukovskii,
D. Shulyatev,
A. Arsenov,
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摘要:
A new method for determining the transport spin-polarization, point contact tunneling from a low temperature superconductor into a ferromagnet, is used to determine the spin polarization of several LaSrMnO thin films and crystals. The Andreev reflection process and its utility in measurements of spin-polarization are described. Preliminary results for the spin polarization of LSMO are presented. ©1999 American Institute of Physics.
ISSN:0094-243X
DOI:10.1063/1.59640
出版商:AIP
年代:1999
数据来源: AIP
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| 72. |
Anomalous linear resistivity from ∼1 to103&hthinsp;KinSr2RuO4−&dgr; |
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AIP Conference Proceedings,
Volume 483,
Issue 1,
1999,
Page 412-417
Davor Pavuna,
La´szlo´ Forro´,
Helmuth Berger,
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摘要:
We discuss striking, linear resistivity in single crystals ofSr2RuO4−&dgr;that persist over three decades of temperature, up to ∼1050K, while the superconductivity remains confined <1 K. This suggests that linear resistivity is not an exclusive feature of the N- state of high-Tccuprates, but rather of all layered oxides, especially perovskites, possibly even independently of the magnitude ofTc.©1999 American Institute of Physics.
ISSN:0094-243X
DOI:10.1063/1.59605
出版商:AIP
年代:1999
数据来源: AIP
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| 73. |
Charge, spin, and lattice excitations in double-layer manganites |
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AIP Conference Proceedings,
Volume 483,
Issue 1,
1999,
Page 418-423
D. B. Romero,
Y. Moritomo,
J. F. Mitchell,
H. D. Drew,
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PDF (346KB)
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摘要:
A Raman-scattering investigation of the double-layer manganites.La2−2xSr1+2xMn2O7(x=0.4,0.5),revealed signatures of a) charge stripe formation and melting, b) small polaron formation, and c) anisotropic quasiparticle dynamics in the ferromagnetic-metallic state. These observations and their implications are discussed in this work. ©1999 American Institute of Physics.
ISSN:0094-243X
DOI:10.1063/1.59606
出版商:AIP
年代:1999
数据来源: AIP
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| 74. |
Universal behavior of magnetization curves inRb3C60fullerene |
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AIP Conference Proceedings,
Volume 483,
Issue 1,
1999,
Page 424-428
Ming-Fong Tai,
Jen-Bin Shi,
Chien-Jang Wu,
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摘要:
The superconductingRb3C60fullerene crystals with a transition temperature of30.5±0.2&hthinsp;Kwere well prepared. We found that the magnetization curves,−4&pgr;M(H),in a wideH–Tregion can be represented to an universal temperature-independent curve with the scaling factor&sqrt;2Hc(T).This scaling behavior is consistent with the prediction of Ginzburg-Landau theory and Hao-Clem variation model. The thermodynamic critical fieldsHcat various temperatures were precisely determined from the−4&pgr;M(H)curves according to the theoretical fitting of Hao-Clem model. Temperature dependence of thermodynamic critical fieldHc(T)in10&hthinsp;K⩽T⩽30&hthinsp;Kis in good agreement to the two-fluid model and BCS theory. However, the best fit is the power-law relation ofHc(T)=Hc(0)*[1−(T/Tc)]&bgr;,whereHc(0)=2344±19&hthinsp;Oe,Tc=29.62±0.07&hthinsp;K,and&bgr;=0.8682±0.008.©1999 American Institute of Physics.
ISSN:0094-243X
DOI:10.1063/1.59641
出版商:AIP
年代:1999
数据来源: AIP
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| 75. |
Interlayer magnetoresistance peak in the ET-based organic superconductors |
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AIP Conference Proceedings,
Volume 483,
Issue 1,
1999,
Page 429-436
Fulin Zuo,
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PDF (526KB)
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摘要:
We report interlayer magnetoresistance studies in the ET-based organic superconductors. For field perpendicular to the planes, the magnetoresistance displays a peak as a function of of field and temperature. By studying the magnetoresistance peak as a function of superconducting transition, we find the magnetoresistance peak is intrinisc to the layered structure. ©1999 American Institute of Physics.
ISSN:0094-243X
DOI:10.1063/1.59642
出版商:AIP
年代:1999
数据来源: AIP
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