Coexistence of different types of vortex lines in anisotropic superconductors
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1997-02-20
Autores
Sardella, Edson [UNESP]
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Elsevier B.V.
Resumo
We considered a system of two vortex lines running in different directions with their average vortex direction making an arbitrary angle theta with respect to the crystal c axis. The free energy of this system is calculated as a function of the relative angle 2 alpha between the two inclined vortex lines with respect to each other. For sufficiently high anisotropy, it is shown that, as the induction is tilted away from the crystal c axis (theta not equal 0), the inclined vortex lines (alpha not equal 0) suddenly becomes more stable than that with parallel vortex lines (alpha = 0). While theta is increased, the system continuously changes towards the parallel configuration before the angle theta approaches 90 degrees.
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Physica C. Amsterdam: Elsevier B.V., v. 275, n. 3-4, p. 231-237, 1997.