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Applicant:
Indian Institute of Technology (IIT) Patna 
Author:
Ashutosh Kumar, C. V. Tomy, Ajay D. Thakur 
Corresponding Authors:
Ashutosh Kumar, Ajay D. Thakur 
DOI #:
https://doi.org/10.1088/2053-1591/aad44c 
Title:
Magnetothermopower, magnetoresistance and magnetothermal conductivity in La0.95Sr0.05Co1-xMnxO3 (0.00 ≤ x ≤ 1.00) 
Journal:
Mat. Res. Exp.  
Year:
2018 
Volume:
Page:
086110  
Keywords:
Magnetothermopower, magnetoresistance and magnetothermal conductivity 
Abstract:
The dependence of magnetic and thermal transport properties on charge states of Mn and Co in LaMnO3 and LaCoO3, respectively, has motivated to perform a systematic study in the La0.95Sr0.05Co1−xMnxO3 (0.00 „ x „ 1.00). Substitution of Mn at Co-site leads to a decrease in both the thermopower(α) and the electrical conductivity (σ) values. However, there is a concomitant increase in the magnetothermopower(MTP) values with an increase in Mn substitution close to paramagnetic to ferromagnetic transition temperature (TC). We observe a tunability in the sign of magnetoresistance with an increase in Mn substitution. Thermal conductivity (κ) exhibits a weak magnetic field dependence with magnetothermal conductivity (MTC) peaking close to TC for 0.50 „ x „ 1.00. A maximum MTP is observed close to TC in x = 0.95 sample. The dependence of α on magnetic field is found to increase with the enhancement of TC in the system. We conclude that Mn substitution at Co-site not only improves the TC in the system but also increases the effect of magnetic field on thermal transport properties 
Entered by:
Venkata Dantham on 2020-08-02 
 
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