To the theory of the superconductive phase in rare earth metal compounds

Savchenko, M. A.; Stephanovich, A.V.

doi:10.1016/0038-1098(82)90328-3

Cited by 7 publications

(7 citation statements)

References 5 publications

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“…Recently the microscopic theory of the superconductive antiferromagnetic metal compounds was constructed [1][2][3]. In the paper [3] we also considered the magnetoresistance in a paramagnetic state of this compounds. It was shown, that the magnetoresistance depends on the addition to conductivity of the system, which is defined by the Вісник ХНУ імені В.Н.…”

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“…It was shown, that the magnetoresistance depends on the addition to conductivity of the system, which is defined by the Вісник ХНУ імені В.Н.  [3]. Thus, the magnetoresistance of a paramagnetic phase depends on the spin-spin relaxation processes of a conductive electrons.…”

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“…Thus, the magnetoresistance of a paramagnetic phase depends on the spin-spin relaxation processes of a conductive electrons. If a long-range magnetic order in the system is possible (antiferromagnetic, for example), then there exists the temperature of the magnetic phase transition = (see [3]). As we consider the superconductive rare earth metal compounds the point N T may prove to be the transition temperature from the paramagnetic state to the superconductive phase, as magnetic fluctuations suppress the Coulomb repulsion of electrons and stimulate the effective electron-phonon interaction.…”

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To the microscopic theory of the superconductive phase in antiferromagnetic metal compounds

Savchenko,

Savchenko

2021

The Journal of v. N. Karazin Kharkiv National University, Series "Physics"

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The theory of the conductivity in antiferromagnetic metal compounds is constructed on the basic of the fluctuational theory of the magnetic superconductors. The superconductor in which there exist localized magnetic moments was considered. It is supposed that magnetic moments are orientated antiferromagnetically in basis plane of the crystal. An estimation for the critical temperature was obtained and necessary and enough conditions of the appearance of high-temperature superconductive phase in rare earth metal compounds were got. The criterion of an appearance of the high-temperature superconductive phase in antiferromagnetic compounds is found.

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To the microscopic theory of the superconductive phase in antiferromagnetic metal compounds

Savchenko,

Savchenko

2021

The Journal of v. N. Karazin Kharkiv National University, Series "Physics"

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“…However the spins of delocalized s-, d-, and f-electrons also exist in the system, and we must take into account their fluctuations as well. 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 ] ) .…”

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