The Theory of the Superconductive Phase in Rare Earth Metal Compounds

Abstract

The microscopic theory of the superconductive phase in rare earth metal compounds is constructe by the contour averages mathematical method. It is shown that in the superconductive phase thd effect of exchange intensification occurs and increase of superconductive phase transition tempere ature is possible. MimpocKonmecKaR Teopm csepxnpoBoAmqefi c$aahrB coegmHeHlrRx p e~~o 3 e~e n b~~i x Ha OCHOBe MaTeMaTH4eCKOrO aIIIIapaTa KOHTYPHOrO PlHTerpHpOBflHPIR, IlOCTpOeHa MeTan,70B. nOKa3aH0, 9 T O B CBepXIIpOBOafIIUefi @a3e HMeeT MeCTO 34@eKT 06MeHHOrO yCHJleHIIH 3,?eHTpOH-@OHOHHOrO B3aIIMOAefiCTBkIII, PTO MOH(eT IlpHBeCTH K IIOBMIUeHI.II0 TeMnepaTypbi c s e p x n p o~o~n~e r o nepexoaa.

Fluctuation Theory of Magnetic Superconductors

“…It was shown in [6, 71 that the superconducting state need not be homogeneous. A new type of a vortex structure may appear in this state [7]. A weak alternating current I = 1 mA passing through a REAl sample and concentrated in a skin layer of the depth 6,R x cm will stabilize the inhomogeneous superconducting state.…”

“…But in this case the laser radiation will interact with the vortex lattice and get absorbed. This is due to the skeleton of each vortex containing a longwavelength magnetic structure (lql-1 x em), which may be described easily by the equations presented in [7]. A peak in the absorption of the emitted power reappears indicating the existence of a superconducting phase in the corresponding temperature region.…”

“…I n magnetic superconductors this fluctuation region is equal to where a is the lattice constant and (rc) the exchange correlation radius in the system of delocalized spins[27], of may be estimated as z$in x 3. This means that the spin fluctuations of delocalized electrons pierce through all the states of magnetic superconductors and considerably extend the region of superconducting fluctuations (see, for example,[ 7 ] ) .…”