Abstract
Superconductivity and magnetism were previously thought as incompatible until the discovery of some rare earth ternary compounds that shows the coexistence of superconductivity and magnetism. In some of the recently discovered iron based layered superconductors superconductivity and diamagnetic order system are coexist. That occurs in only 11 and 122 family. The present works we examine the possibility of coexistence of superconductivity and disorder of magnetic spin is called spin glass when freeze the system that can show the superconductivity and spin glass coexist. In this present work we can examine the possibility of coexistence of superconductivity and spin glass in detailed 11 family of Fe1+ySexTe1−x compound. We show that spin glass like behavior is present in FST for x = 0.1 - 0.15 we present evidence form magnetization measurement and characterized the short-range order with neutron scattering. One of our main results is that the short-range order is structural as well as magnetic order. The factor of magnetic order exchange in long range depend on temperature, pressure, number of doping and other external factor discussed it. We found mathematical expression for superconductor transition TC, spin glass temperature TgSusceptibility x(q), and retardation time τ using for born approximation and digamma function depend on wave vector(q) and cut off frequency(ω) in the region coexistence of superconductivity and spin glass in Fe1+ySexTe1−xcompound.
Highlights
Superconductivity is a phenomena occurring in a certain materials at extremely low temperature, characterized by exactly zero electrical resistance as wall as there is no magnetic field
The superconductivity coexist with spin glass occur in(11) and(122)family, because they have vary at low critical temperature Fe1+ySeXTe1−X and Ba (Fe1−yCoX)2As2 there is evidence for coexistence of spin glass and superconductivity
We have examined a variety of recent experiments performed on spin glass alloys with respect to three ranges of temperature T > Tg, T = Tg and T < Tg
Summary
Superconductivity is a phenomena occurring in a certain materials at extremely low temperature, characterized by exactly zero electrical resistance as wall as there is no magnetic field It was discovered in 1911 by Heike kamerlingh Onnes, who was studying the resistance of solid mercury at extremely low temperatures using the recently discovered liquid helium as a refrigerant. In the recent time the high temperature of superconductor un expected discovered based on Fe-Pnictides approximately six different www.openaccesspub.org structures of the FeAs layer families have been found. They are 11, 111, 122, 1111, 32522, and 21311 (or 42622) families. In addition to LaFeAsO1−XFX, the most remarkable 1111, compounds that Show high-TC superconductivity discovered until now are: i) imFeAsO1−XFX(TC ≈ 43K)
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