Electron Spin Resonance of Conduction Electrons and Spin Waves Dynamics Investigations in Bi-2223 Superconductor for Decoding Pairing Mechanism

Authors: S. N. Ekbote, G. K. Padam, Manju Arora

Abstract:

Electron spin resonance (ESR) spectroscopic investigations of (Bi, Pb)2Sr2Ca2Cu3O10-x (Bi-2223) bulk samples were carried out in both the normal and superconducting states. A broad asymmetric resonance signal with side signals is obtained in the normal state, and all of them disappear in the superconducting state. The temperature and angular orientation effects on these signals suggest that the broad asymmetric signal arises from electron spin resonance of conduction electrons (CESR) and the side signals from exchange interactions as Platzman-Wolff type spin waves. The disappearance of CESR and spin waves in a superconducting state demonstrates the role of exchange interactions in Cooper pair formation.

Keywords: Bi-2223 superconductor, electron spin resonance of conduction electrons, electron spin resonance, Exchange interactions, spin waves.

References:

[1] McKinnon, W.R., Mortan, J.R., and Pleizier, G., EPR Silence in Superconducting Oxides. Solid State Commun. 66, 1093-1095 (1988)
[2] Songlinu, Y., Jiaqi, Z., Sizhao, J., and Weiyan, G., EPR of BiSrCaCu2Oy high Tc Superconductors, Solid State Commun.70, 329-331 (1989)
[3] Nishida, A., and Horai, K., ESR Absorption in a High- Tc Bi(Pb)-Sr-Ca-Cu-O Superconductor, Japn. J. Appl. Phys. 29, L46-L49 (1990)
[4] Simon, S., Burzo, E., Cozar, O., Barbur, I., Simon, V., Ardelean, I., Pop, V., Borodi, Gh. Structural, Electric and Magnetic Properties of Bi(Pb)-Sr-Ca(Re)-Cu(M)-O, Physica C, 185-189, 899-900 (1991)
[5] Ishida, T., Kanoda, K., Takahashi, T., and Koga, K., Origin of Spin Susceptibility in Bi2Sr2Can-1CunO2n+4 (n=1,2,3), Physica C 178, 231-243 (1991)
[6] Owens, F.J. and Iqbal, Z., Paramagnetic Resonance and Non-Resonant Microwave Absorption in the Bi-Sr-Ca-Cu- oxide high temperature superconductors, Solid State Commun. 68, 523-526 (1989)
[7] Masterov, V.F., Shibanova, N.M., and Shtel’makh, K.F., Electron spin resonance in manganese- doped BSCCO (2212) crystals, Tech. Phys. 42,1234-1235 (1997)
[8] Hayashi, Y., Fukui, M., Sasakura, H., Minamigawa, S., Fujita, T., and Nakahigashi, K., Characteristics of Holes Investigated by ESR in High-Tc phase of Bi(Pb)-Sr-Ca-Cu-O System, Jpn. J. Appl. Phys. 28, L759-L761 (1989).
[9] Hayashi, Y., Sako, S., Fukui, M., Fujita, T., Sasakura, H., Minamigawa, S., Fujita T., and Nakahigashi, K., Reappearance of ESR in the Bi(Pb)-Sr-Ca-Cu-O System in the Superconducting State, Jpn. J. Appl. Phys. 28, L1531- L1532 (1989)
[10] Shaltiel, D., Bill, H., Decroux, M., Hagemann, H., Junod, A., Peter, M., Ravisekhar, Y., Triscone, G., Walker, E.,Yan, Y.F., and Zhao, Z.X., Observation of ESR in the Bi High -Tc Superconductors, Physica C,157, 240-246 (1989)
[11] Ballarino, A., Martini, L., Mathot, S., Taylor, T., and Brambilla, R., Large Scale Assembly and Characterization of Bi-2223 HTS Conductors, IEEE transactions on applied superconductivity 17, 3121-3123 (2007)
[12] Padam, G.K., Sood, K.N., Arora, M., Ekbote, S.N. and Kaushik, S.D., Effect of Europium Substitution on the Phase Evolution and Superconducting Properties of (Bi, Pb)- 2223 system, J. Sci. Rev. 5,1-5 (2013), http://www. srbmag.org/index.php/srbmag/article/view/138.
[13] Janssens, L., Stesmans, A., Cousins, J. and Witters, J., Observation of CESR in High-purity Aluminium by a Reflection Spectrometer, Phys. Stat. Sol.(b) 67, 231-237 (1975)
[14] S. Shultz, D. Dunifer and C. Latham, Observation of Conduction Electron Spin Resonance in Aluminium, Phys. Lett. 23, 192-193 (1966)
[15] Dunifer, G.L., Pattison, M.R., and Hsu, T.M., Spin-wave excitations in aluminimum, Phys. Rev. B 15, 315-322 (1977).
[16] Ekbote, S.N., Gupta, S.K., and Narlikar, A.V., The CESR and Spin Wave Studies Of A-I5 Films in Normal and Superconducting States, Solid State Commun., 36, 117-122 (1980)
[17] Ekbote, S.N., and Narlikar, A.V., Superconductivity and Superconducting Materials, South Asian publishers Pvt Lid. Page 236 (1983)
[18] Vier, D.C., and Schultz, S., Observation of Conduction Electron Spin Resonance in both the Normal and Superconducting States of Niobium, Physics Lett. 98A, 283-286 (1983)
[19] Bhatt, S.V., Ganguly, P. and C.N.R. Rao, A “EPR” study of YBa2Cu3O7 and related high-temperature superconductors, Pramana-J. Phys. 28, L 425-L427 (1987)
[20] Lue, J.T., and Wu, P.T., Observation of spin- waves and chemical shifts in the high-temperature superconductingYBa2Cu3O7-, Solid State Commun. 66, 55-58 (1988)
[21] Lue, J.T., Electron-spin-resonance of the Ag-Eu-, and Gd-doped Y-Ba-Cu-O high -Tc superconductors, Phys. Rev. B38, 4592-4595 (1988)
[22] Janossy, A, Chauvet, O., Pekker, S., Cooper, J.R., and Forro, L., Conduction Electron Spin Resonance in Rb3C60, Phys. Rev. Letts.71,1091-1094 (1993)
[23] Simon, F., Janossy, A., Feher, T., Muranyi, F., Garaj, S., Forro, L., Petrovic, C., Bud’ko, S., Ribeiro, R.A. and Canfield, P.C., Magnetic–self-field-induced density of states in MgB2:Spin susceptibility measured by conduction-electron spin resonance, Phys. Rev. B72,012511-1 to 012111-5 (2005)
[24] Awad, R., Isber, S., Abou Aly, A.I., Abdeen, W., El-Tahan, A., El-Maghraby, E.M., Khalaf, A., and Noureddine, S., EPR studies of SmBa2Cu3O7-δ/MnFe2O4 superconducting composites, Frontiers in Theoretical and Applied Physics/UAE 2017 (FTAPS 2017) IOP Conf. Series: Journal of Physics: Conf. Series 869 (2017) 012033 (5 pp.).
[25] Aoi, K., and Swihart, J.C., Theory of Electron Spin Resonance in Type-I Supercondutors, Phys. Rev. B 2, 2555-2560 (1970)
[26] Platzman, P.W., and Wolff, P.A., Spin-Wave Excitation in Nonferromagnetic Metals, Phys. Rev. Letts. 18, 280-287 (1967)
[27] Lauginie, L., Estrade, H., Conard, J., Guerad, D., Lagrange, P., and Makrini, M.E., Graphite lamellar compounds EPR Studies, Physica B 99,514- 520 (1980)
[28] Mehran, F., Barnes, S.E., McGuire, T.R., Gallagngher, W.J., Sandstrom, R.L. Dinger, T.R. and Chance, D.A., Paramagnetic resonance of Cu2+ ions in the superconductor Y0.2Ba0.8CuOx, Phys. Rev. B 36, 740-742 (1987)
[29] Yoshida, K., Paramagnetic Susceptibility in Superconductors, Phys. Rev, 110, 769-770 (1958)
[30] Ekbote, S.N., CESR in superconductors: Relevance of high Tc copper oxide systems, Bull. Mater. Sci. 14, 631- 635 (1991)