Role of strain and microstructure in chemical solution deposited La0.7Pb0.3MnO3 manganite films: Thickness dependent swift heavy ions irradiation studies

Kataria, Bharat; Solanki, P.S.; Khachar, Uma; Vagadia, Megha; Ravalia, Ashish; Keshvani, M. J.; Trivedi, Priyanka; Venkateshwarlu, D.; Ganesan, V.; Asokan, K.; Shah, N.A.

doi:10.1016/j.radphyschem.2013.01.023

Cited by 61 publications

(13 citation statements)

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“…A 100 nm thick film of LCMO manganite was grown on a single crystalline (100) LAO substrate using the cost effective CSD wet method by employing the following steps and parameters: high purity lanthanum acetate [La(CH 3 COO) 3 27 to obtain the film thickness of B50 nm. The as-grown LCMO film was dried at 150 1C for 30 min to dry out the water content from the thin film surface followed by calcination at 350 1C for 30 min to expel the organic constituents from the entire film layer.…”

Section: Methodsmentioning

confidence: 99%

Transport properties and electroresistance of a manganite based heterostructure: role of the manganite–manganite interface

Gadani

Dhruv

Joshi

et al. 2016

Phys. Chem. Chem. Phys.

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In this paper, we report the results of the investigations on the transport properties performed across the manganite-manganite interface in the LaMnO3-δ/La0.7Ca0.3MnO3/LaAlO3 (LMO/LCMO/LAO) heterostructure. The bilayered heterostructure was synthesized by a low cost and simple chemical solution deposition (CSD) method by employing the acetate precursor route. The same LMO/LCMO/LAO heterostructure was also grown using the dry metal oxide chemical vapor deposition (CVD) method and the results of transport characterization have been compared on the basis of wet and dry chemical methods used. XRD Φ-scan measurements were carried out to verify the structural quality and crystallographic orientations of LMO and LCMO manganite layers, for both wet and dry chemical method grown heterostructures. For wet and dry chemical methods, the temperature dependent resistance of the LMO/LCMO interface suggests the metallic nature. The asymmetric I-V curves collected at different temperatures show normal diode characteristics which get transformed to backward diode characteristics at high temperatures under high applied voltages at Vtr for both the methods. The values of Vtr are strongly dependent on the chemical method used. I-V data have been fitted using the Simmons model at different temperatures and discussed in terms of the spin-flip scattering mechanism for both wet and dry chemical method grown heterostructures. The electric field dependent electroresistance (ER) behavior of the presently studied LMO/LCMO manganite-manganite interface, grown using wet and dry chemical methods, has been understood on the basis of complex mechanisms including charge injection, formation of the depletion region, the tunneling effect, thermal processes and junction breakdown and their dependence on the applied electric field, field polarity and temperature studied.

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Section: Methodsmentioning

confidence: 99%

Transport properties and electroresistance of a manganite based heterostructure: role of the manganite–manganite interface

Gadani

Dhruv

Joshi

et al. 2016

Phys. Chem. Chem. Phys.

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“…To explore the application potential of sol-gel-grown nanostructured LPMO samples, we have calculated the temperature and field sensitivity of resistivity quantified by temperature coefficient of resistance [TCR = (1/R) 9 (dR/ dT) 9 100 (%/K)] and field coefficient of resistance [FCR = (1/R) 9 (dR/dH) 9 100 (%/T)], respectively. Few reports are available on the field and temperature sensitivities of manganite-based thin films (Parmar et al 2006;Markna et al 2006;Kataria et al 2013) but, for the first time, we report the TCR and FCR studies on nanostructured manganites to understand the effect of surface and nanostructured secondary grain growth. Figure 6 shows the variation in TCR with temperature under various applied fields.…”

Section: Resultsmentioning

confidence: 99%

“…Till date, several research reports are available on the particle size-dependent changes in the transport and magnetic properties of mixed valent manganites (Gaur and Varma 2006;Siwach et al 2006) but very few studies are reported on the temperature and field sensitivity in manganite-based thin films (Markna et al 2006;Parmar et al 2006;Kataria et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Size effects in magnetotransport in sol–gel grown nanostructured manganites

2014

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We report the results of the studies on polycrystalline nanostructured La 0.7 Pb 0.3 MnO 3 (LPMO) manganites synthesized using sol-gel method employing metal acetate precursor route. Interestingly, it is observed that crystallite size decreases with increase in sintering temperature while microscopic investigations reveal the second grain growth in all the samples. A correlation between the grain morphology and secondary grain growth with the transport and magnetotransport in LPMO manganites has been established. Observation of large temperature sensitivity (*-28.29 %/K @ 0 T;[300 K) and field sensitivity (*-48.70 %/T @ 0.2 T; 5 K) in the samples sintered at higher temperature (*1150°C) has been understood in the light of observed secondary grain growth in the form of nanosized grains over the surface of primary grains.

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“…Lattice distortion induced complexity of manganites in the complete range of substitution can be directly correlated with the changes, balance and tunability of various ground states of different phases which produces significant changes in their physical properties. The delicate balance between various physical properties can be tuned by relatively small variations in external and internal parameters such as temperature [3 -5], magnetic field [5 -8], electric field [9], pressure [10], strain [11,12], irradiation [13,14], granular morphology (grain size, grain boundary density, porosity, and grain boundary nature) [15 -18], etc.…”

Section: Introductionmentioning

confidence: 99%

Structure and microstructure dependent transport and magnetic properties of sol–gel grown nanostructured La 0.6 Nd 0.1 Sr 0.3 MnO 3 manganites: Role of oxygen

Kansara

Dhruv

Joshi

et al. 2015

Applied Surface Science

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Role of strain and microstructure in chemical solution deposited La0.7Pb0.3MnO3 manganite films: Thickness dependent swift heavy ions irradiation studies

Cited by 61 publications

References 20 publications

Transport properties and electroresistance of a manganite based heterostructure: role of the manganite–manganite interface

Transport properties and electroresistance of a manganite based heterostructure: role of the manganite–manganite interface

Size effects in magnetotransport in sol–gel grown nanostructured manganites

Structure and microstructure dependent transport and magnetic properties of sol–gel grown nanostructured La 0.6 Nd 0.1 Sr 0.3 MnO 3 manganites: Role of oxygen

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