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Vol. 38 No. 9 (2026): Vol 38 Issue 9 Year 2026

Copyright (c) 2026 Supriya Dutta, Soumen Rakshit, Paresh Chandra Jana, Animesh Sahana, Kajal Gupta

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This work is licensed under a Creative Commons Attribution 4.0 International License.

Charge Transport and Magnetoresistive Mechanisms in Samarium-Doped Manganite Nanoparticles and Their Polypyrrole Nanocomposite

https://doi.org/10.14233/ajchem.2026.36271
Supriya Dutta
Department of Chemistry, Nistarini College, Deshbandhu Road, Purulia-723101, India
https://orcid.org/0009-0004-3069-9059
Soumen Rakshit
Department of Physics, Vidyasagar University, Paschim Medinipur-721102, India
https://orcid.org/0000-0002-4728-9257
Paresh Chandra Jana
Department of Physics, Vidyasagar University, Paschim Medinipur-721102, India
https://orcid.org/0000-0002-4868-0223
Animesh Sahana
Department of Chemistry, Nistarini College, Deshbandhu Road, Purulia-723101, India
https://orcid.org/0009-0009-9509-8197
Kajal Gupta
Department of Chemistry, Nistarini College, Deshbandhu Road, Purulia-723101, India
https://orcid.org/0000-0001-8994-6780

Corresponding Author(s) : Animesh Sahana

sahana.animesh@gmail.com

Asian Journal of Chemistry, Vol. 38 No. 9 (2026): Vol 38 Issue 9 Year 2026

Abstract

A detailed investigation of charge transport, encompassing direct-current (DC) and alternating-current (AC) conduction, was performed for samarium-doped manganite nanoparticles and their polypyrrole (PPy)-based nanocomposites. The electrical transport characteristics of the pristine manganite and nanocomposite systems were examined as a function of temperature, magnetic field and samarium concentration. The pristine manganite exhibits characteristic polycrystalline magnetoresistance (MR), with MR increasing from ~55% for the lowest samarium concentration (M1) to ~75% for the highest concentration (M5) at 50 K. Spin-polarized tunneling across grain boundaries constitutes the dominant MR mechanism, with the temperature dependence supporting the role of suppressed spin fluctuations. The nanocomposites exhibit anomalous, fluctuation-like field-dependent MR behaviour that varies with temperature and samarium concentration, with the effect being most pronounced at lower samarium concentrations over the 50-250 K temperature range. This behaviour is attributed to the competition between weak localization and charge-carrier delocalization within a core-shell architecture, mediated by intermediate exchange coupling and the incorporation of polypyrrole. The distinct transport and magnetoresistance responses of the manganite nanoparticles and PPy-based nanocomposites provide insight into the interplay between grain-boundary effects, magnetic exchange interactions and polymer-mediated charge transport.

Keywords

Magnetoresistance Manganite Nanocomposite Spin-polarized tunneling Spin fluctuation
(1)
Dutta, S.; Rakshit, S.; Jana, P. C.; Sahana, A.; Gupta, K. Charge Transport and Magnetoresistive Mechanisms in Samarium-Doped Manganite Nanoparticles and Their Polypyrrole Nanocomposite. ajc 2026, 38, 2268-2280.
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References
  1. E. Tafra, N. Novosel, Ž. Skoko, T. Ivek, M. Basletić, B. Mihaljević, Z. Jagličić, D. Rivas Góngora, A. Hamzić, V. Roddatis, F. Fischgrabe, V. Moshnyaga, S. Tomić, B. Korin-Hamzić and M. Čulo, Phys. Rev. B, 111, 115107 (2025); https://doi.org/10.1103/PhysRevB.111.115107
  2. A. Malisa and Z. Ivanov, J. Magnet. Magnet. Mater., 295, 277 (2005); https://doi.org/10.1016/j.jmmm.2005.01.030
  3. Y. Tokura, Colossal Magnetoresistive Oxides, Gordon and Breach, New York (2000).
  4. N. Boora, R. Ahmad, S. Rahman, N.Q. Dung, M.B. Alshammari, A. Ahmad and B.-Il Lee, Magnetochemistry, 11, 5 (2025); https://doi.org/10.3390/magnetochemistry11010005
  5. K. Vladimir, M. Marchenko and Y. Melikhov, Phys. Rev. B, 82, 064419 (2010); https://doi.org/10.1103/PhysRevB.82.064419
  6. A.K. Pramanik and A. Banerjee, Phys. Rev. B, 81, 024431 (2010); https://doi.org/10.1103/PhysRevB.81.024431
  7. Z. Zhang, J. Li, W. Zhou, C. Yang, Q. Cao, D. Wang and Y. Du, Ceram. Int., 44, 3760 (2018); https://doi.org/10.1016/j.ceramint.2017.11.159
  8. J. Liu, Z. Du, S. Jiang, H. Shen, Z. Li, D. Xing, W. Ma and J. Sun, J. Magnet. Magn. Mater., 385, 145 (2015); https://doi.org/10.1016/j.jmmm.2015.02.050
  9. D.A. Bukreev, M.S. Derevyanko and A.V. Semirov, Sensors, 22, 9512 (2022); https://doi.org/10.3390/s22239512
  10. P. Dey and T.K. Nath, Phys. Rev. B Condens. Matter Mater. Phys., 73, 214425 (2006); https://doi.org/10.1103/PhysRevB.73.214425
  11. P. Dey, T.K. Nath, U. Kumar and P.K. Mukhopadhyay, J. Appl. Phys., 98, 014306 (2005); https://doi.org/10.1063/1.1928307
  12. M. Verhage, E.V. Minne, E.M. Kiens, L. Korol, R.J. Spiteri, G. Koster, R.J. Green, C. Baeumer and C.J. Flipse, ACS Appl. Mater. Interfaces, 16, 21273 (2024); https://doi.org/10.1021/acsami.3c17639
  13. A. Swain, K. Komatsu, M. Itoh, T. Taniyama and V. Gorige, AIP Adv., 8, 055808 (2018); https://doi.org/10.1063/1.5006597
  14. U.K. Sinha, A. Sahoo and P. Padhan, J. Alloys Compd., 952, 170037 (2023); https://doi.org/10.1016/j.jallcom.2023.170037
  15. K. Gupta, G. Chakraborty, S. Ghatak, P.C. Jana and A.K. Meikap, J. Appl. Polym. Sci., 15, 2911 (2010); https://doi.org/10.1002/app.31380
  16. K. Gupta, G. Chakraborty, S. Ghatak, P.C. Jana, A.K. Meikap and R. Babu, J. Appl. Phys., 108, 073701 (2010); https://doi.org/10.1063/1.3489899
  17. N. Asim, S. Radiman and M.A. Yarmo, Mater. Lett., 62, 1044 (2008); https://doi.org/10.1016/j.matlet.2007.07.051
  18. G. Chakraborty, K. Gupta, A.K. Meikap, R Babu and W.J. Blau, Solid State Commun., 152, 13 (2012); https://doi.org/10.1016/j.ssc.2011.10.018
  19. K. Gupta, P.C. Jana and A.K. Meikap, Solid State Sci., 14, 324 (2012); https://doi.org/10.1016/j.solidstatesciences.2011.12.003
  20. K. Gupta, P.C. Jana, A.K. Meikap and T.K. Nath, J. Appl. Phys., 107, 073704 (2010); https://doi.org/10.1063/1.3360933
  21. K. Chang, J.B. Xia and F.M. Peeters, Phys. Rev. B Condens. Matter, 65, 115209 (2002); https://doi.org/10.1103/PhysRevB.65.115209.
  22. N.C. Mamani, G.M. Gusev, O.E. Raichev, T.E. Lamas and A.K. Bakarov, Phys. Rev. B Condens. Matter Mater. Phys., 80, 075308 (2009); https://doi.org/10.1103/PhysRevB.80.075308
  23. S. Bahraeian, K. Abron, F. Pourjafarian and R.A. Majid, Adv. Mat. Res., 795, 707 (2013); https://doi.org/10.4028/www.scientific.net/AMR.795.707
  24. J.R. Xavier, J.R. Beryl, S.P. Vinodhini and G.B. Janaki, J. Bio Tribocorros., 7, 46 (2021); https://doi.org/10.1007/s40735-021-00479-7
  25. B. Sevil and K. Zuhal, Macromol. Symp., 295, 59 (2010); https://doi.org/10.1002/masy.200900164
  26. S. Gharbi, Y. Marouani, F. Issaoui, E. Dhahri, E.K. Hlil, R. Barille and B.F.O. Costa, J. Mater. Sci.: Mater. Electron., 31, 11983 (2020); https://doi.org/10.1007/s10854-020-03780-2
  27. H. Liu, A. Pourret and P. Guyot-Sionnest, ACS Nano, 4, 5211 (2010); https://doi.org/10.1021/nn101376u
  28. B.I. Shklovskii, Sov. Phys. JETP Lett., 36, 51 (1982).
  29. Y. Kajikawa, Philosophical Mag., 106, 277 (2026); https://doi.org/10.1080/14786435.2025.2564418
  30. Y. Kajikawa, Philosophical Mag., 103, 1464 (2023); https://doi.org/10.1080/14786435.2023.2208884
  31. R. Rosenbaum, H. Castro and W. Schoepe, Physica B, 294-295, 486 (2001); https://doi.org/10.1016/S0921-4526(00)00706-7
  32. V.L. Nguyen, B.Z. Spivak and B.I. Shklovskii, JETP Lett., 41, 42 (1985).
  33. A.V. Shumilin and V.I. Kozub, Phys. Rev. B, 85, 115203 (2012); https://doi.org/10.1103/PhysRevB.85.115203
  34. H.A. Walling, E.G. Gwinn, K.D. Maranowski and A.C. Gossard, Phys. Rev. B, 71, 045327 (2005); https://doi.org/10.1103/PhysRevB.71.045327
  35. S. Ju, K.W. Yu and Z.Y. Li, Phys. Rev. B, 71, 014416 (2005); https://doi.org/10.1103/PhysRevB.71.014416
  36. P. Dey, T. K. Nath, Appl. Phys. Lett., 87, 162501 (2005); https://doi.org/10.1063/1.2089179
  37. J.S. Helman and B. Abeles, Phys. Rev. Lett., 37, 1429 (1976); https://doi.org/10.1103/PhysRevLett.37.1429
  38. V. Dayal and V. Punith Kumar, Solid State Commun., 158, 70, (2013); https://doi.org/10.1016/j.ssc.2012.10.006
  39. N.F. Mott and E.A. Davis, Electronic Processes in Non-Crystalline Materials, Oxford University Press, London, edn. 2 (1979).
  40. M.N. Islam, S.K. Ram and S. Kumar, Physica E, 41, 1025 (2009); https://doi.org/10.1016/j.physe.2008.08.047
  41. S.R. Elliott, Adv. Phys., 36, 135 (1987); https://doi.org/10.1080/00018738700101971
  42. V. Gvozdikov, Phys. Rev. B, 75, 115106 (2007); https://doi.org/10.1103/PhysRevB.75.115106
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Author Biography

Animesh Sahana, Department of Chemistry, Nistarini College, Deshbandhu Road, Purulia-723101, India

Rank: Assistant Professor

Department of Chemistry

Nistarini College, Purulia

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