Effect of the cation substitution on the structural, electrical and magnetic properties in the electron-doped manganites

ABSTRACT

Effect of cation substitution on the structural, electrical and magnetic properties in an electron-doped perovskite manganites viz. La_0.90Zr_0.10MnO₃ (Zr10) and La_0.90Te_0.10MnO₃ (Te10) prepared by solid-state reaction is reported herein. XRD indicates that both samples are polycrystalline with rhombohedral crystal structure. The strong absorption in FTIR spectra at ∼615 cm⁻¹ was of Mn-O bond, which gets slightly shifted due to different ionic radii of cations. A large resistivity with a slight increase in transition temperature in the case of Te10 than Zr10 indicates that the ‘Te’ doping stabilizes the ground state of double-exchange mechanism between the e_g levels and t_2g levels.

KEYWORDS:

• Electron-doped manganite
• structural Study
• electrical Study
• and magnetic study

Funding

One of the authors NGD is thankful to DST for awarding the DST-INSPIRE Faculty Award by Department of Science and Technology (DST), Ministry of India, New Delhi [IFA-13 PH -61 dated 1 August 2013]. Also, NGD and ARS acknowledges to UGC-DAE Consortium for Scientific Research Indore for financial and characterization support through [CSR-IC/BL-14/CRS-111/2016-17/357 dated 17 June 2016]. NGD is also thankful to UGC-DAE CSR, Mumbai for characterization support through [UDCSR/MUM/CD/CRS-M-255/2017/1025 dated 18 Jan 2017].