Hysteretic ac loss of superconducting strips simultaneously exposed to ac transport current and phase-different ac magnetic field

Abstract

A simple analytical expression is presented for hysteretic ac loss $Q$ of a superconducting strip simultaneously exposed to an ac transport current $I_0\cos \omega t$ and a phase-different ac magnetic field $H_0\cos (\omega t+{\theta }_0)$. On the basis of Bean's critical state model, we calculate $Q$ for small current amplitude $I_0\ll I_c$, for small magnetic field amplitude $H_0\ll I_c/2\pi a$, and for arbitrary phase difference ${\theta }_0$, where $I_c$ is the critical current and $2a$ is the width of the strip. The resulting expression for $Q=Q(I_0,H_0,{\theta }_0)$ is a simple biquadratic function of both $I_0$ and $H_0$, and $Q$ becomes maximum (minimum) when ${\theta }_0=0$ or $\pi$ (${\theta }_0=\pi /2$).

4 pages, 2 figures, submitted to Appl. Phys. Lett

References in corpus (1)

• Alternating current loss in radially arranged superconducting strips

Cited by in corpus (4)

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• ac Losses in a Finite Z Stack Using an Anisotropic Homogeneous-Medium Approximation
• Field and current distributions and ac losses in a bifilar stack of superconducting strips
• Hysteretic ac loss of polygonally arranged superconducting strips carrying ac transport current