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Title: Structural and magnetotransport properties of the Y doped A-site deficient double layered manganites La{sub 1.2−x}□{sub 0.2}Y{sub x}Ca{sub 1.6}Mn{sub 2}O{sub 7}

Abstract

We present structural, magnetic and electrical properties of the polycrystalline A-site-deficient yttrium doped double layered manganites La{sub 1.2−x}□{sub 0.2}Y{sub x}Ca{sub 1.6}Mn{sub 2}O{sub 7} (x=0.2, 0.3 and 0.4) prepared by a solid state reaction method. The samples crystallize in the tetragonal structure with the space group I4/mmm. Doping with Y decreases the cell parameters and causes a decrease of the metal-insulator transition temperature. The same evolution with doping is also seen for the deduced Curie temperature from susceptibility curves which present a clear paramagnetic-ferromagnetic transition. The significant positive intrinsic magnetoresistance, shown in all samples, reaches 85% at 122 K under 7 T for 0.3 doped sample and can be attributed to the suppression of spin fluctuations via aligning the spins under external magnetic field, while the extrinsic one is attributed to the inter-grain spin-polarized tunneling across the grain boundaries. The simulation of the resistivity curves in the entire temperature range show that the percolation model is suitable to fit our results. The applied magnetic field increases the density of states near the Fermi level, which is in accordance with the observed decrease of resistivity. - Graphical abstract: Resistivity and magnetoresistance of La{sub 1.2−x}□{sub 0.2}Y{sub x}Ca{sub 1.6}Mn{sub 2}O{sub 7} (x=0.2, 0.3, 0.4).more » Solid lines correspond to the fitting results. Display Omitted.« less

Authors:
 [1];  [1];  [2];  [3]; ;  [2]
  1. LEND, Faculty of Science and Technology, Jijel University, Jijel 18000 (Algeria)
  2. Department of Physics, Faculty of Arts and Sciences, AIB University, Bolu 14280 (Turkey)
  3. (KUYTAM), 34450-Sariyer, Istanbul (Turkey)
Publication Date:
OSTI Identifier:
22584171
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 240; Other Information: Copyright (c) 2016 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; CURIE POINT; DENSITY; DENSITY OF STATES; DOPED MATERIALS; FERMI LEVEL; GRAIN BOUNDARIES; MAGNETIC FIELDS; MAGNETIC SUSCEPTIBILITY; MAGNETORESISTANCE; PARAMAGNETISM; PHASE TRANSFORMATIONS; POLYCRYSTALS; SIMULATION; SOLIDS; SPACE GROUPS; SPIN; SPIN ORIENTATION; TETRAGONAL LATTICES; TUNNEL EFFECT; YTTRIUM

Citation Formats

Mahamdioua, N., E-mail: mahamdioua.nabil@gmail.com, Amira, A., Altintas, S.P., Koc University, Surface Science and Technology Center, Varilci, A., and Terzioglu, C. Structural and magnetotransport properties of the Y doped A-site deficient double layered manganites La{sub 1.2−x}□{sub 0.2}Y{sub x}Ca{sub 1.6}Mn{sub 2}O{sub 7}. United States: N. p., 2016. Web. doi:10.1016/J.JSSC.2016.05.011.
Mahamdioua, N., E-mail: mahamdioua.nabil@gmail.com, Amira, A., Altintas, S.P., Koc University, Surface Science and Technology Center, Varilci, A., & Terzioglu, C. Structural and magnetotransport properties of the Y doped A-site deficient double layered manganites La{sub 1.2−x}□{sub 0.2}Y{sub x}Ca{sub 1.6}Mn{sub 2}O{sub 7}. United States. doi:10.1016/J.JSSC.2016.05.011.
Mahamdioua, N., E-mail: mahamdioua.nabil@gmail.com, Amira, A., Altintas, S.P., Koc University, Surface Science and Technology Center, Varilci, A., and Terzioglu, C. Mon . "Structural and magnetotransport properties of the Y doped A-site deficient double layered manganites La{sub 1.2−x}□{sub 0.2}Y{sub x}Ca{sub 1.6}Mn{sub 2}O{sub 7}". United States. doi:10.1016/J.JSSC.2016.05.011.
@article{osti_22584171,
title = {Structural and magnetotransport properties of the Y doped A-site deficient double layered manganites La{sub 1.2−x}□{sub 0.2}Y{sub x}Ca{sub 1.6}Mn{sub 2}O{sub 7}},
author = {Mahamdioua, N., E-mail: mahamdioua.nabil@gmail.com and Amira, A. and Altintas, S.P. and Koc University, Surface Science and Technology Center and Varilci, A. and Terzioglu, C.},
abstractNote = {We present structural, magnetic and electrical properties of the polycrystalline A-site-deficient yttrium doped double layered manganites La{sub 1.2−x}□{sub 0.2}Y{sub x}Ca{sub 1.6}Mn{sub 2}O{sub 7} (x=0.2, 0.3 and 0.4) prepared by a solid state reaction method. The samples crystallize in the tetragonal structure with the space group I4/mmm. Doping with Y decreases the cell parameters and causes a decrease of the metal-insulator transition temperature. The same evolution with doping is also seen for the deduced Curie temperature from susceptibility curves which present a clear paramagnetic-ferromagnetic transition. The significant positive intrinsic magnetoresistance, shown in all samples, reaches 85% at 122 K under 7 T for 0.3 doped sample and can be attributed to the suppression of spin fluctuations via aligning the spins under external magnetic field, while the extrinsic one is attributed to the inter-grain spin-polarized tunneling across the grain boundaries. The simulation of the resistivity curves in the entire temperature range show that the percolation model is suitable to fit our results. The applied magnetic field increases the density of states near the Fermi level, which is in accordance with the observed decrease of resistivity. - Graphical abstract: Resistivity and magnetoresistance of La{sub 1.2−x}□{sub 0.2}Y{sub x}Ca{sub 1.6}Mn{sub 2}O{sub 7} (x=0.2, 0.3, 0.4). Solid lines correspond to the fitting results. Display Omitted.},
doi = {10.1016/J.JSSC.2016.05.011},
journal = {Journal of Solid State Chemistry},
number = ,
volume = 240,
place = {United States},
year = {Mon Aug 15 00:00:00 EDT 2016},
month = {Mon Aug 15 00:00:00 EDT 2016}
}