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Electrical properties and conduction mechanisms in La2/3Ca1/3MnO3 thin films prepared by pulsed laser deposition on different substrates

Perovskite manganite La2/3Ca1/3MnO3 thin films were directly grown on MgO(100), Si(100) and glass substrates by pulsed laser deposition. From the XRD patterns, the films are found to be polycrystalline, single-phase orthorhombic. The metal-insulator transition temperature is 209 K for LCMO/MgO, 266...

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Main Authors: Navasery, Manizheh, Shaari, Abdul Halim, Dehzangi, Arash, Soltani, Nayereh, Bahmanrokh, Ghazaleh, Haghiri, Maryam Erfani, Kamalianfar, Ahmad, Pan, Kai Yap, Chang, Sen Choung, Chen, Soo Kien, Lim, Kean Pah, Awang Kechik, Mohd Mustafa
Format: Article
Language:English
Published: Springer 2014
Online Access:http://psasir.upm.edu.my/id/eprint/52307/1/52307.pdf
http://psasir.upm.edu.my/id/eprint/52307/
http://rd.springer.com/article/10.1007/s00339-014-8295-5
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spelling my.upm.eprints.523072017-06-05T05:41:43Z http://psasir.upm.edu.my/id/eprint/52307/ Electrical properties and conduction mechanisms in La2/3Ca1/3MnO3 thin films prepared by pulsed laser deposition on different substrates Navasery, Manizheh Shaari, Abdul Halim Dehzangi, Arash Soltani, Nayereh Bahmanrokh, Ghazaleh Haghiri, Maryam Erfani Kamalianfar, Ahmad Pan, Kai Yap Chang, Sen Choung Chen, Soo Kien Lim, Kean Pah Awang Kechik, Mohd Mustafa Perovskite manganite La2/3Ca1/3MnO3 thin films were directly grown on MgO(100), Si(100) and glass substrates by pulsed laser deposition. From the XRD patterns, the films are found to be polycrystalline, single-phase orthorhombic. The metal-insulator transition temperature is 209 K for LCMO/MgO, 266 K for LCMO/Si and 231 K for film deposited on the glass substrate. The conduction mechanism in these films is investigated in different temperature regimes. Low-temperature resistivity data below the phase transition temperature (T P) have been fitted with the relation ρ = ρ0 + ρ 2T2 + ρ 4.5T4.5, indicating that the electron-electron scattering affects the conduction of these materials. The high-temperature resistivity data (T > T P) were explained using variable-range hopping (VRH) and small-polaron hopping (SPH) models. Debye temperature values are 548 K for LCMO/Cg, 568 K for LCMO/Si and 508 K for LCMO/MgO thin films. In all thin films, the best fitting in the range of VRH is found for 3D dimension. The density of states near the Fermi level N (E F) for LCMO/MgO is lower due to the prominent role of the grain boundary in LCMO/MgO and increase in bending of Mn-O-Mn bond angle, which decreases the double exchange coupling of Mn 3+-O2-Mn4+ and in turn makes the LCMO/MgO sample less conducting as compared to the other films. Springer 2014 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/52307/1/52307.pdf Navasery, Manizheh and Shaari, Abdul Halim and Dehzangi, Arash and Soltani, Nayereh and Bahmanrokh, Ghazaleh and Haghiri, Maryam Erfani and Kamalianfar, Ahmad and Pan, Kai Yap and Chang, Sen Choung and Chen, Soo Kien and Lim, Kean Pah and Awang Kechik, Mohd Mustafa (2014) Electrical properties and conduction mechanisms in La2/3Ca1/3MnO3 thin films prepared by pulsed laser deposition on different substrates. Applied Physics A: Materials Science & Processing, 116 (4). pp. 1661-1668. ISSN 0947-8396; ESSN: 1432-0630 http://rd.springer.com/article/10.1007/s00339-014-8295-5 10.1007/s00339-014-8295-5
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description Perovskite manganite La2/3Ca1/3MnO3 thin films were directly grown on MgO(100), Si(100) and glass substrates by pulsed laser deposition. From the XRD patterns, the films are found to be polycrystalline, single-phase orthorhombic. The metal-insulator transition temperature is 209 K for LCMO/MgO, 266 K for LCMO/Si and 231 K for film deposited on the glass substrate. The conduction mechanism in these films is investigated in different temperature regimes. Low-temperature resistivity data below the phase transition temperature (T P) have been fitted with the relation ρ = ρ0 + ρ 2T2 + ρ 4.5T4.5, indicating that the electron-electron scattering affects the conduction of these materials. The high-temperature resistivity data (T > T P) were explained using variable-range hopping (VRH) and small-polaron hopping (SPH) models. Debye temperature values are 548 K for LCMO/Cg, 568 K for LCMO/Si and 508 K for LCMO/MgO thin films. In all thin films, the best fitting in the range of VRH is found for 3D dimension. The density of states near the Fermi level N (E F) for LCMO/MgO is lower due to the prominent role of the grain boundary in LCMO/MgO and increase in bending of Mn-O-Mn bond angle, which decreases the double exchange coupling of Mn 3+-O2-Mn4+ and in turn makes the LCMO/MgO sample less conducting as compared to the other films.
format Article
author Navasery, Manizheh
Shaari, Abdul Halim
Dehzangi, Arash
Soltani, Nayereh
Bahmanrokh, Ghazaleh
Haghiri, Maryam Erfani
Kamalianfar, Ahmad
Pan, Kai Yap
Chang, Sen Choung
Chen, Soo Kien
Lim, Kean Pah
Awang Kechik, Mohd Mustafa
spellingShingle Navasery, Manizheh
Shaari, Abdul Halim
Dehzangi, Arash
Soltani, Nayereh
Bahmanrokh, Ghazaleh
Haghiri, Maryam Erfani
Kamalianfar, Ahmad
Pan, Kai Yap
Chang, Sen Choung
Chen, Soo Kien
Lim, Kean Pah
Awang Kechik, Mohd Mustafa
Electrical properties and conduction mechanisms in La2/3Ca1/3MnO3 thin films prepared by pulsed laser deposition on different substrates
author_facet Navasery, Manizheh
Shaari, Abdul Halim
Dehzangi, Arash
Soltani, Nayereh
Bahmanrokh, Ghazaleh
Haghiri, Maryam Erfani
Kamalianfar, Ahmad
Pan, Kai Yap
Chang, Sen Choung
Chen, Soo Kien
Lim, Kean Pah
Awang Kechik, Mohd Mustafa
author_sort Navasery, Manizheh
title Electrical properties and conduction mechanisms in La2/3Ca1/3MnO3 thin films prepared by pulsed laser deposition on different substrates
title_short Electrical properties and conduction mechanisms in La2/3Ca1/3MnO3 thin films prepared by pulsed laser deposition on different substrates
title_full Electrical properties and conduction mechanisms in La2/3Ca1/3MnO3 thin films prepared by pulsed laser deposition on different substrates
title_fullStr Electrical properties and conduction mechanisms in La2/3Ca1/3MnO3 thin films prepared by pulsed laser deposition on different substrates
title_full_unstemmed Electrical properties and conduction mechanisms in La2/3Ca1/3MnO3 thin films prepared by pulsed laser deposition on different substrates
title_sort electrical properties and conduction mechanisms in la2/3ca1/3mno3 thin films prepared by pulsed laser deposition on different substrates
publisher Springer
publishDate 2014
url http://psasir.upm.edu.my/id/eprint/52307/1/52307.pdf
http://psasir.upm.edu.my/id/eprint/52307/
http://rd.springer.com/article/10.1007/s00339-014-8295-5
_version_ 1643835209791045632
score 13.211869

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