Anomalous electrical relaxation and polaron conduction in nano-crystalline Mn                         0.5                         Zn                         0.5                         Fe                         2                         O                         4

N. S.Krishna Kumar; T. S. Shahid; G. Govindaraj

doi:10.1063/1.4918097

Anomalous electrical relaxation and polaron conduction in nano-crystalline Mn _0.5 Zn _0.5 Fe ₂ O ₄

N. S.Krishna Kumar, T. S. Shahid, G. Govindaraj

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

2 Scopus citations

Abstract

Nano-crystalline Mn _0.5 Zn _0.5 Fe ₂ O ₄ was synthesized by chemical co-precipitation method and characterized with X-ray diffraction. Ac electrical impedance data are taken for the frequency range of 1Hz to 1MHz for various temperatures from 303K to 483K. The ac electrical conduction deviates from the Debye type relaxation which indicates polaron type conduction. In the present study unique anomalous relaxation function in time and frequency domain is used to investigate deviation from the Debye relaxation. The physical basis of anomalous or non-Debye process is explained in terms of change in Debye dipole μ _D =ρr _D of charge ρ into gρ due to the molecular charge interaction and defect disorder. This interaction shifts the Debye relaxation rate τ to a slow relaxation rate τ ^g . The fraction 0<g<1 is emerged as the exponent on frequency and time domain function of non-Debye relaxation.

Original language	English (US)
Title of host publication	Solid State Physics
Subtitle of host publication	Proceedings of the 59th DAE Solid State Physics Symposium 2014
Editors	R. Chitra, N. K. Sahoo, Dibyendu Bhattacharyya
Publisher	American Institute of Physics Inc.
ISBN (Electronic)	9780735413108
DOIs	https://doi.org/10.1063/1.4918097
State	Published - Jun 24 2015
Externally published	Yes
Event	59th DAE Solid State Physics Symposium, SSPS 2014 - Vellore, Tamilnadu, India Duration: Dec 16 2014 → Dec 20 2014

Publication series

Name	AIP Conference Proceedings
Volume	1665
ISSN (Print)	0094-243X
ISSN (Electronic)	1551-7616

Conference

Conference	59th DAE Solid State Physics Symposium, SSPS 2014
Country/Territory	India
City	Vellore, Tamilnadu
Period	12/16/14 → 12/20/14

Bibliographical note

Publisher Copyright:
© 2015 AIP Publishing LLC.

Keywords

Impedance spectroscopy
Manganese zinc ferrite
Non-Debye
Polaron

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10.1063/1.4918097

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Kumar, N. S. K., Shahid, T. S., & Govindaraj, G. (2015). Anomalous electrical relaxation and polaron conduction in nano-crystalline Mn _0.5 Zn _0.5 Fe ₂ O ₄ In R. Chitra, N. K. Sahoo, & D. Bhattacharyya (Eds.), Solid State Physics: Proceedings of the 59th DAE Solid State Physics Symposium 2014 Article 110041 (AIP Conference Proceedings; Vol. 1665). American Institute of Physics Inc.. https://doi.org/10.1063/1.4918097

Anomalous electrical relaxation and polaron conduction in nano-crystalline Mn _0.5 Zn _0.5 Fe ₂ O ₄ . / Kumar, N. S.Krishna; Shahid, T. S.; Govindaraj, G.
Solid State Physics: Proceedings of the 59th DAE Solid State Physics Symposium 2014. ed. / R. Chitra; N. K. Sahoo; Dibyendu Bhattacharyya. American Institute of Physics Inc., 2015. 110041 (AIP Conference Proceedings; Vol. 1665).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Kumar, NSK, Shahid, TS & Govindaraj, G 2015, Anomalous electrical relaxation and polaron conduction in nano-crystalline Mn _0.5 Zn _0.5 Fe ₂ O ₄ in R Chitra, NK Sahoo & D Bhattacharyya (eds), Solid State Physics: Proceedings of the 59th DAE Solid State Physics Symposium 2014., 110041, AIP Conference Proceedings, vol. 1665, American Institute of Physics Inc., 59th DAE Solid State Physics Symposium, SSPS 2014, Vellore, Tamilnadu, India, 12/16/14. https://doi.org/10.1063/1.4918097

Kumar NSK, Shahid TS, Govindaraj G. Anomalous electrical relaxation and polaron conduction in nano-crystalline Mn _0.5 Zn _0.5 Fe ₂ O ₄ In Chitra R, Sahoo NK, Bhattacharyya D, editors, Solid State Physics: Proceedings of the 59th DAE Solid State Physics Symposium 2014. American Institute of Physics Inc. 2015. 110041. (AIP Conference Proceedings). doi: 10.1063/1.4918097

Kumar, N. S.Krishna ; Shahid, T. S. ; Govindaraj, G. / Anomalous electrical relaxation and polaron conduction in nano-crystalline Mn _0.5 Zn _0.5 Fe ₂ O ₄ Solid State Physics: Proceedings of the 59th DAE Solid State Physics Symposium 2014. editor / R. Chitra ; N. K. Sahoo ; Dibyendu Bhattacharyya. American Institute of Physics Inc., 2015. (AIP Conference Proceedings).

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