Magneto-transport studies on (Pr1/3Sm2/3)2/3A1/3MnO3 (A = Ca, Sr and Ba) compounds
Saket Asthana, D. Bahadur (Department of Metallurgical Engineering and, Materials Science, Indian Institute of Technology, IIT Bombay, Powai, Mumbai,, India), A.K. Nigam, S.K. Malik (Tata Institute of Fundamental Research,, Colaba, Mumbai, India)
TL;DR
This study investigates the magnetic and transport properties of (Pr1/3Sm2/3)2/3A1/3MnO3 compounds with A = Ca, Sr, Ba, revealing distinct behaviors like charge ordering, metal-insulator transition, and high magnetoresistance depending on the A-site substitution.
Contribution
It provides comparative analysis of magnetic and transport behaviors in these compounds, highlighting the influence of different A-site cations on their properties.
Findings
Charge ordering only in Ca-substituted compound
Metal-insulator transition in Sr-substituted compound
Highest magnetoresistance in Ba-substituted compound
Abstract
Magnetic and transport properties of (Pr1/3Sm2/3)2/3A1/3MnO3 (A = Ca, Sr and Ba) compounds, prepared by the citrate gel route, have been investigated. These compounds are found to crystallize in the orthorhombic structure. Charge ordering transport behavior is indicated only in Ca-substituted compound. The Sr- and Ba-substituted compounds show metal-insulator transition and semiconducting-like behavior, respectively. The magnetoresistance is highest in the Ba substituted compound. All the three samples show irreversibility in magnetization as a function of temperature in zero-field cooled (ZFC) and field cooled (FC) plots. The non-saturating magnetization, even at 5K and 4 Tesla field, are observed in Ca as well Ba-substituted compounds.
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