Magneto-elastic coupling model of deformable anisotropic superconductors

Magneto-elastic coupling model of deformable anisotropic superconductors
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可变形各向异性超导体的磁弹耦合模型

DOI:
10.1209/0295-5075/118/27006/meta
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发表时间:
2017-04
期刊:
Europhysics Letters
影响因子:
--
通讯作者:
Yuanwen Gao
Yuanwen Gao
中科院分区:
其他
文献类型:
--
作者:
Yingxu Li;Guozheng Kang;Yuanwen Gao

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建立了涡旋晶格与晶体弹性相互作用的磁弹性耦合模型。超导各向异性和弹性各向异性同时包含在GL理论框架中。在这种考虑下,自由能的表达式统一了经典结果的不同形式。对于磁化能对磁化强度的影响,该理论能较好地描述磁化强度随上临界场的变化规律。在压力对临界温度有较强依赖性的材料中,ME相互作用对磁化强度的贡献与涡旋-晶格能相当。当沿不同涡轴方向的磁化分量与应变有关时,磁化比与ME相互作用无关。强调指出,磁化比的GL描述只有在外加磁场适度接近上临界场时才适用。
We develop a magneto-elastic (ME) coupling model for the interaction between the.vortex lattice and crystal elasticity. The anisotropies in superconductivity and elasticity are simultaneously included in the GL theory frame. Under this consideration, the expression of the.free energy unifies the different forms of the classical results. Concerning the ME effect on the.magnetization, the theory can give a satisfying description for the field dependence of magnetization near the upper critical field. The contribution of the ME interaction to the magnetization is.comparable to the vortex-lattice energy, in materials with relatively strong pressure dependence.of the critical temperature. While the magnetization components along different vortex frame.axes are strain dependent, the magnetization ratio is independent of the ME interaction. It is.stressed that the GL description of the magnetization ratio is applicable only if the applied field.moderately close to the upper critical field.
DOI: --
发表时间: 2011
期刊: --
影响因子: --
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