The Shielding Effect of the Meissner Current on the Magnetic Dipole Interactions in the Coexistence State of Superconductivity and Ferromagnetism : Condensed Matter and Statistical Physics

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概要

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• By considering the finite mass effect of the photons (or the shielding effect of the Meissner current), the expression for the magnetic dipole interactions(MDI) in a superconductor is obtained. The resultant expression shows that when the system is in the coexistence state of superconductivity and ferromagnetism, the quantity λ_L/R becomes an important factor in discussing the degeneracy of the spin-wave energies in the long wavelength region. Here λ_L and R are London's penetration depth and the size of the system, respectively. Under the strong shielding effect, the contribution from MDI is almost negligible. We also derive MDI in a superconducting film, and point out that in the coexistence state the uniaxial magnetic shape anisotropy is weakened by the surface effect.

• 理論物理学刊行会の論文
• 1986-01-25

著者

• Shimodaira H

  Department Of Physics Saitama University

• SEKI Seiichi

  Department of Physics, Saitama University

• SHIMODAIRA Hajime

  Department of Physics, Saitama University

• Seki S

  Saitama Univ. Urawa

• Seki Seiichi

  Department Of Physics Faculty Of Science Saitama University

• Shimodaira Hajime

  Department Of Physics Saitama University

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