Structural, magneto transport and magnetic properties of Ruddlesden–Popper La2-2xSr1+2xMn2O7 (0.42≤x≤0.52) layered manganites
Abstract
The magneto transport of Ruddlesden–Popper, La2-2xSr1+2xMn2O7 (0.42≤x≤0.52), 2-dimensional bilayered manganites have been investigated in a broad temperature range. The samples have been synthesized using the solid-state reaction method. Rietveld refinement of the X-ray diffraction data indicates the tetragonal structure formation with I4/mmm space group. The resistivity curves of the samples present a general characteristic of metal-insulator (MI) transition at certain temperature (TMI). Besides, for samples with x = 0.48, 0.50, and 0.52, at a certain temperature (TCO) well below TMI the charge ordering is also evident. Furthermore, the samples display a shallow upturn in resistivity below Tmin due to the Kondo like spin scattering effect, weak localization and electron-phonon interaction. The high temperature semiconducting (T>TMI) region, the resistivity curve follows the 3D Mott’s variable hopping transport mechanism. The overall suppression of resistivity accounts for a substantial magnetoresistance by applying a magnetic field and the characteristic change in TMI, TCO, and Tmin are discussed. Temperature-dependent magnetization demonstrates the suppression of ferromagnetism and evident of antiferromagnetic nature with an apparent charge ordering with increasing concentration of Sr2+.
- Authors:
-
- Maharaja Inst. of Technology Mysore (Aff. VTU-Belagavi), Karnataka (India)
- Ames Lab., Ames, IA (United States)
- Publication Date:
- Research Org.:
- Ames Lab., Ames, IA (United States)
- Sponsoring Org.:
- Science and Engineering Research Board (SERB); UGC-DAE-Consortium for Scientific Research; USDOE Office of Science (SC), Basic Energy Sciences (BES). Materials Sciences & Engineering Division
- OSTI Identifier:
- 1769019
- Report Number(s):
- IS-J-10,429
Journal ID: ISSN 2158-3226; TRN: US2207182
- Grant/Contract Number:
- CSR-IC/CRS-89/2014-2019; EMR/2016/005424
- Resource Type:
- Accepted Manuscript
- Journal Name:
- AIP Advances
- Additional Journal Information:
- Journal Volume: 11; Journal Issue: 2; Conference: 65. Annual Conference on Magnetism and Magnetic Materials (MMM 2020), Palm Beach (held virtually), FL (United States), 2-6 Nov 2020; Journal ID: ISSN 2158-3226
- Publisher:
- American Institute of Physics (AIP)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; Ferromagnetism; Elementary particle interactions; Magnetic ordering; Phase transitions Magnons; Perovskites; Transport properties; Electronic transport; X-ray diffraction
Citation Formats
Saw, Ajay Kumar, Gupta, Shalabh, and Dayal, Vijaylakshmi. Structural, magneto transport and magnetic properties of Ruddlesden–Popper La2-2xSr1+2xMn2O7 (0.42≤x≤0.52) layered manganites. United States: N. p., 2021.
Web. doi:10.1063/9.0000109.
Saw, Ajay Kumar, Gupta, Shalabh, & Dayal, Vijaylakshmi. Structural, magneto transport and magnetic properties of Ruddlesden–Popper La2-2xSr1+2xMn2O7 (0.42≤x≤0.52) layered manganites. United States. https://doi.org/10.1063/9.0000109
Saw, Ajay Kumar, Gupta, Shalabh, and Dayal, Vijaylakshmi. Thu .
"Structural, magneto transport and magnetic properties of Ruddlesden–Popper La2-2xSr1+2xMn2O7 (0.42≤x≤0.52) layered manganites". United States. https://doi.org/10.1063/9.0000109. https://www.osti.gov/servlets/purl/1769019.
@article{osti_1769019,
title = {Structural, magneto transport and magnetic properties of Ruddlesden–Popper La2-2xSr1+2xMn2O7 (0.42≤x≤0.52) layered manganites},
author = {Saw, Ajay Kumar and Gupta, Shalabh and Dayal, Vijaylakshmi},
abstractNote = {The magneto transport of Ruddlesden–Popper, La2-2xSr1+2xMn2O7 (0.42≤x≤0.52), 2-dimensional bilayered manganites have been investigated in a broad temperature range. The samples have been synthesized using the solid-state reaction method. Rietveld refinement of the X-ray diffraction data indicates the tetragonal structure formation with I4/mmm space group. The resistivity curves of the samples present a general characteristic of metal-insulator (MI) transition at certain temperature (TMI). Besides, for samples with x = 0.48, 0.50, and 0.52, at a certain temperature (TCO) well below TMI the charge ordering is also evident. Furthermore, the samples display a shallow upturn in resistivity below Tmin due to the Kondo like spin scattering effect, weak localization and electron-phonon interaction. The high temperature semiconducting (T>TMI) region, the resistivity curve follows the 3D Mott’s variable hopping transport mechanism. The overall suppression of resistivity accounts for a substantial magnetoresistance by applying a magnetic field and the characteristic change in TMI, TCO, and Tmin are discussed. Temperature-dependent magnetization demonstrates the suppression of ferromagnetism and evident of antiferromagnetic nature with an apparent charge ordering with increasing concentration of Sr2+.},
doi = {10.1063/9.0000109},
journal = {AIP Advances},
number = 2,
volume = 11,
place = {United States},
year = {Thu Feb 18 00:00:00 EST 2021},
month = {Thu Feb 18 00:00:00 EST 2021}
}
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