Investigation on structural, electrical, magnetic and thermoelectric properties of low bandwidth Sm1-xSrxMnO3 (0.2≤x≤0.5) manganites

B. S. Nagaraja, Ashok Rao, Poornesh P, Tarachand, G. S. Okram

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We present a systematic study on structural, electrical and magnetic properties of low bandwidth compounds of the family Sm1−xSrxMnO3. The samples were prepared by conventional solid-state reaction. Rietveld analysis of XRD results show that the samples crystallized in orthorhombic crystal structure with Pbnm space group. The unit volume is decreasing with increasing Sr concentration. The electrical resistivity is suppressed with application of magnetic field. Huge magnetoresistance has been observed for samples with x=0.4 and x=0.5. The validity of the percolation model has been verified in the entire temperature range. The magnetic studies show that the field-induced critical temperature and Neel temperature transitions are seen in all compounds. The samples with x=0.2 and 0.3 show positive S values in the entire temperature range. The Seebeck coefficient (S) of the x=0.5 sample is negative in the entire temperature range, and for the sample with x=0.4 exhibits a crossover in S value from positive to negative values. The analysis of S data indicates that the small polaron hopping model is valid in the high temperature region.

Original languageEnglish
Pages (from-to)67-77
Number of pages11
JournalPhysica B: Condensed Matter
Volume523
DOIs
Publication statusPublished - 15-10-2017

Fingerprint

Manganites
electrical properties
magnetic properties
bandwidth
Bandwidth
Temperature
Rietveld analysis
Gene Conversion
Neel temperature
Seebeck coefficient
Magnetoresistance
Solid state reactions
temperature
Seebeck effect
Structural properties
neel temperature
Magnetic properties
Electric properties
Crystal structure
critical temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Electrical and Electronic Engineering

Cite this

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title = "Investigation on structural, electrical, magnetic and thermoelectric properties of low bandwidth Sm1-xSrxMnO3 (0.2≤x≤0.5) manganites",
abstract = "We present a systematic study on structural, electrical and magnetic properties of low bandwidth compounds of the family Sm1−xSrxMnO3. The samples were prepared by conventional solid-state reaction. Rietveld analysis of XRD results show that the samples crystallized in orthorhombic crystal structure with Pbnm space group. The unit volume is decreasing with increasing Sr concentration. The electrical resistivity is suppressed with application of magnetic field. Huge magnetoresistance has been observed for samples with x=0.4 and x=0.5. The validity of the percolation model has been verified in the entire temperature range. The magnetic studies show that the field-induced critical temperature and Neel temperature transitions are seen in all compounds. The samples with x=0.2 and 0.3 show positive S values in the entire temperature range. The Seebeck coefficient (S) of the x=0.5 sample is negative in the entire temperature range, and for the sample with x=0.4 exhibits a crossover in S value from positive to negative values. The analysis of S data indicates that the small polaron hopping model is valid in the high temperature region.",
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Investigation on structural, electrical, magnetic and thermoelectric properties of low bandwidth Sm1-xSrxMnO3 (0.2≤x≤0.5) manganites. / Nagaraja, B. S.; Rao, Ashok; P, Poornesh; Tarachand; Okram, G. S.

In: Physica B: Condensed Matter, Vol. 523, 15.10.2017, p. 67-77.

Research output: Contribution to journalArticle

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AU - Nagaraja, B. S.

AU - Rao, Ashok

AU - P, Poornesh

AU - Tarachand,

AU - Okram, G. S.

PY - 2017/10/15

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N2 - We present a systematic study on structural, electrical and magnetic properties of low bandwidth compounds of the family Sm1−xSrxMnO3. The samples were prepared by conventional solid-state reaction. Rietveld analysis of XRD results show that the samples crystallized in orthorhombic crystal structure with Pbnm space group. The unit volume is decreasing with increasing Sr concentration. The electrical resistivity is suppressed with application of magnetic field. Huge magnetoresistance has been observed for samples with x=0.4 and x=0.5. The validity of the percolation model has been verified in the entire temperature range. The magnetic studies show that the field-induced critical temperature and Neel temperature transitions are seen in all compounds. The samples with x=0.2 and 0.3 show positive S values in the entire temperature range. The Seebeck coefficient (S) of the x=0.5 sample is negative in the entire temperature range, and for the sample with x=0.4 exhibits a crossover in S value from positive to negative values. The analysis of S data indicates that the small polaron hopping model is valid in the high temperature region.

AB - We present a systematic study on structural, electrical and magnetic properties of low bandwidth compounds of the family Sm1−xSrxMnO3. The samples were prepared by conventional solid-state reaction. Rietveld analysis of XRD results show that the samples crystallized in orthorhombic crystal structure with Pbnm space group. The unit volume is decreasing with increasing Sr concentration. The electrical resistivity is suppressed with application of magnetic field. Huge magnetoresistance has been observed for samples with x=0.4 and x=0.5. The validity of the percolation model has been verified in the entire temperature range. The magnetic studies show that the field-induced critical temperature and Neel temperature transitions are seen in all compounds. The samples with x=0.2 and 0.3 show positive S values in the entire temperature range. The Seebeck coefficient (S) of the x=0.5 sample is negative in the entire temperature range, and for the sample with x=0.4 exhibits a crossover in S value from positive to negative values. The analysis of S data indicates that the small polaron hopping model is valid in the high temperature region.

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