Rodriguez, J. P. and Barnes, P. N. and Varanasi, C. V. (2008) In-field critical current of type-II superconductors caused by strain from nanoscale columnar inclusions. PHYSICAL REVIEW B, 78 (5).
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Official URL: http://arxiv.org/abs/0804.0307?context=cond-mat
The results of a linear elasticity analysis yields that nanorod inclusions aligned along the c axis of a thin film of YBa2Cu3O7-delta, such as BaZrO3 and BaSnO3, squeeze that matrix by pure shear. The sensitivity of the superconducting critical temperature in that material to the latter implies that the phase boundary separating the nanorod inclusion from the superconductor acts as a collective pinning center for the vortex lattice that appears in external magnetic field. A dominant contribution to the in-field critical current can result. The elasticity analysis also yields that the growth of nanorod inclusions can be weakly metastable when the inclusion is softer than the matrix.
|Uncontrolled Keywords:||barium compounds; critical current density (superconductivity); elasticity; flux pinning; inclusions; magnetic fields; nanostructured materials; superconducting materials; superconducting thin films; superconducting transition temperature; yttrium compounds|
|Subjects:||Physical Science > Nanoelectronics|
|Deposited By:||Lesley Tobin|
|Deposited On:||13 Nov 2008 15:42|
|Last Modified:||27 Jan 2009 16:59|
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