A Simple Model for Investigation of the Pair Breaking Effect on the Parameters of HTS/FM Thin Films

Abstract:

A simple model was proposed for description of Cooper pair breaking effect (which is caused by transfer of spin-polarized carriers from the ferromagnetic (FM) manganite into the high temperature superconductor (HTS)) on the critical temperature and the microwave surface impedance of HTS/FM heterostructures. The model is based on the assumption on an exponential dependence of the Cooper pairs concentration (as well as number of the holes in CuO₂ planes, responsible for the superconductivity) on the distance from HTS/FM interface. The model fits well the thickness dependence of HTS film parameters and is used for evaluation of the penetration depth of spin-polarized particles into HTS in the HTS/FM structures.

• Periodical: Solid State Phenomena (Volumes 233-234)
• Pages: 662-665
• DOI: https://doi.org/10.4028/www.scientific.net/SSP.233-234.662
• Online since: July 2015
• Authors: Timerfayaz Nurgaliev*, Ludmila Uspenskaya
• Keywords: Cooper Pair Breaking, Critical Temperature, HTS/FM, Microwave Surface Impedance, Simple Model

References

[1] N.C. Yeh, R.P. Vasquez, C.C. Fu, A.V. Samoilov, Y. Li, K. Vakili, Nonequilibrium superconductivity under spin-polarized quasiparticle currents in perovskite ferromagnet – insulator – superconductor heterostructures, Phys. Rev. B 60 (1999).

DOI: 10.1103/physrevb.60.10522

[2] V. Pena, C. Visani, J. Garcia-Barriocanal, D. Arias, Z. Sefrioui, C. Leon, J. Santamaria, C.A. Almasan, Spin diffusion versus proximity effect at ferromagnet/superconductor La0. 7Sr0. 3MnO3/YBa2Cu3O7-δ interfaces, Phys. Rev. B 73 (2006).

[3] O. Moran, E. Baca, F.A. Perez, Depression of superconducting critical temperature and finite –size scaling relation in YBa2Cu3O7-δ/La2/3Sr1/3MnO3 bilayers, Microelectronics Journal 39 (2008) 556-559.

DOI: 10.1016/j.mejo.2007.07.036

[4] K. Senapati, R.C. Budhani, Superconducting and normal-state interlayer-exchange-coupling in La0. 67Sr0. 33MnO3-YBa2Cu3O7-La0. 67Sr0. 33MnO3 epitaxial trilayers, arXiv: cond-mat/0504237v1 [cond-mat. super-con] 11 Apr (2005).

DOI: 10.1063/1.2143136

[5] J.G. Lin, D. Hsu, M.Y. Song, C.H. Chiang, W.C. Chan, Thickness and field depedent superconductivity in YBa2Cu3O7/La0. 7Sr0. 3MnO3 bilayers, J. Appl. Phys. 107 (2010) 09E130-1/3.

DOI: 10.1063/1.3366605

[6] H. -U. Habermeier, S. Soltan, J. Albrecht, Dependence of the critical temperature of YBCO thin films n spin-polarized quasiparticle injecrion, Physica C 460 – 462 (2007) 32-35.

DOI: 10.1016/j.physc.2007.03.010

[7] S. Soltan, J. Albrecht, U. -H. Habermeier, Transport properties of LCMO/YBCO hybrid structures, Material Science and Engineering B 144 (2007) 15-18.

DOI: 10.1016/j.mseb.2007.07.081

[8] T. Nurgaliev, E. Mateev, B. Blagoev, L. Neshkov, I. Nedkov, L.S. Uspenskaya, Effect of DC current injection on AC current carrying ability of ring shaped HTS thin films, Physica C 471 (2011) 577-581.

DOI: 10.1016/j.physc.2011.07.003

[9] T. Nurgaliev, B. Blagoev, E. Mateev, L. Neshkov, V. Strbik, L. Uspenskaya, I. Nedkov, Š. Chromik, Investigation of DC current injection effect on the microwave characteristics of HTS YBCO microstrip resonators, Physica C 498, (2014) 1-4.

DOI: 10.1016/j.physc.2013.12.002

[10] R. Liang, D.A. Bonn, W.N. Hardy, Evaluation of CuO2 plane hole doping in YBa2Cu3O6+x single crystals, Phys. Rev. B 73 (2006), 180505(R).