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Joint effect of composition and strain on the anomalous transport properties of LaNiO3 films

Zhu, Mingwei and Komissinskiy, Philipp and Radetinac, Aldin and Wang, Zhanjie and Alff, Lambert (2015):
Joint effect of composition and strain on the anomalous transport properties of LaNiO3 films.
In: Journal of Applied Physics, AIP Publishing LLC, p. 155306, 117, (15), ISSN 0021-8979, [Online-Edition: http://dx.doi.org/10.1063/1.4918661],
[Article]

Abstract

In the present work, epitaxial LaNi1−xO3 films were grown on SrTiO3, (LaAlO3)0.3(Sr2AlTaO6)0.7, and LaAlO3 substrates by pulsed laser deposition from targets with different Ni stoichiometry. Effect of Ni content on the transport properties of LaNiO3 films was investigated under different strain states. It is found that under tensile strain the carriers in the LaNi0.98O3 films behave according to the Fermi-liquid theory, while under compressive strain an anomalous T1.5 dependence of the resistivity which does not agree with the Fermi-liquid theory is observed in the films. On the other hand, only T1.5 dependence is observed in the LaNi1.20O3 films irrespective of strain states. The results show that strain has a profound influence on the transport properties of LNO films with Ni deficiency and the effect of strain is eliminated in the LNO films with excess Ni. Combined with the XRD results, it is proposed that the change in transport behavior is closely related to the stoichiometry of the LNO films. The mechanism behind is investigated based on the intrinsic and extrinsic factors of the films under different strains.

Item Type: Article
Erschienen: 2015
Creators: Zhu, Mingwei and Komissinskiy, Philipp and Radetinac, Aldin and Wang, Zhanjie and Alff, Lambert
Title: Joint effect of composition and strain on the anomalous transport properties of LaNiO3 films
Language: English
Abstract:

In the present work, epitaxial LaNi1−xO3 films were grown on SrTiO3, (LaAlO3)0.3(Sr2AlTaO6)0.7, and LaAlO3 substrates by pulsed laser deposition from targets with different Ni stoichiometry. Effect of Ni content on the transport properties of LaNiO3 films was investigated under different strain states. It is found that under tensile strain the carriers in the LaNi0.98O3 films behave according to the Fermi-liquid theory, while under compressive strain an anomalous T1.5 dependence of the resistivity which does not agree with the Fermi-liquid theory is observed in the films. On the other hand, only T1.5 dependence is observed in the LaNi1.20O3 films irrespective of strain states. The results show that strain has a profound influence on the transport properties of LNO films with Ni deficiency and the effect of strain is eliminated in the LNO films with excess Ni. Combined with the XRD results, it is proposed that the change in transport behavior is closely related to the stoichiometry of the LNO films. The mechanism behind is investigated based on the intrinsic and extrinsic factors of the films under different strains.

Journal or Publication Title: Journal of Applied Physics
Volume: 117
Number: 15
Publisher: AIP Publishing LLC
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Advanced Thin Film Technology
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 21 Apr 2015 11:02
Official URL: http://dx.doi.org/10.1063/1.4918661
Identification Number: doi:10.1063/1.4918661
Funders: This work was supported by the National Natural Science of Foundation of China (No. 51202256), the National Basic Research Program (No. 2010CB934603), the Ministry of Science and Technology of China, and by Deutsche Forschungsgemeinschaft (KO 4093/1-1)., M. W. Zhu would like to thank China Scholarship Council (CSC) for the financial support of his scientific visit to TU Darmstadt, Germany.
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