Pressure effect on the magnetic penetration depth in MgB2 -: art. no. 094504

被引：11
|
作者：
Di Castro, D
Khasanov, R
Grimaldi, C
Karpinski, J
Kazakov, SM
Brütsch, R
Keller, H
机构：
[1] Univ Zurich, Inst Phys, CH-8057 Zurich, Switzerland
[2] Univ Roma La Sapienza, INFM, I-00185 Rome, Italy
[3] Univ Roma La Sapienza, Dipartimento Fis, I-00185 Rome, Italy
[4] ETH, Neutron Scattering Lab, CH-5232 Villigen, Switzerland
[5] Paul Scherrer Inst, CH-5232 Villigen, Switzerland
[6] Univ Geneva, DPMC, CH-1211 Geneva, Switzerland
[7] Ecole Polytech Fed Lausanne, LPM, CH-1015 Lausanne, Switzerland
[8] ETH, Solid State Phys Lab, CH-8093 Zurich, Switzerland
[9] Paul Scherrer Inst, Lab Mat Behav, CH-5232 Villigen, Switzerland
来源：
PHYSICAL REVIEW B | 2005年 / 72卷 / 09期
关键词：
D O I：
10.1103/PhyRevB.72.094504
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
A study of the pressure effect on the magnetic penetration depth lambda in polycrystalline MgB2 was performed by measuring the temperature dependence of the magnetization under an applied pressure of 0.15 and 1.13 GPa. We found that lambda(-2) at low temperature is only slightly affected by pressure [Delta lambda(-2)/lambda(-2)=3.1(9)%], in contrast to cuprate superconductors, where, in the same range of pressure, a very large effect on lambda(-2) was found. Theoretical estimates indicate that most of the pressure effect on lambda(-2) in MgB2 arises from the electron-phonon interaction.
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页数：5
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