Mixed-exchange: Cr & Fe doped La0.7Ca0.3MnO 3

Neeraj Kumar, A. Rao, V. P.S. Awana

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Structural, electrical and magnetic studies of La0.7Ca 0.3Mn1-xCrxO3 and La 0.7Ca0.3Mn1-xFexO 3 manganites are studied here. With Cr and Fe-doping at Mn-site the TIM decreases along with a hump like feature for higher Cr-content samples. The hump structure basically signifies the onset of anti-ferromagnetic (AFM) interactions as being suggested by magnetic studies. On the other hand Fe ion doesn't contribute in double-exchange (DE) conduction mechanism due to its stable half filled 3d orbital. The presence of Fe3+ ions strongly encourages anti-ferromagnetism (AFM) generated by super-exchange interaction and suppress insulator-metal transition temperature (TIM). Magnetic measurements show the existence of magnetic polaron supported by increase in volume of unit cell.

Original languageEnglish
Title of host publicationSolid State Physics - Proceedings of the 55th DAE Solid State Physics Symposium 2010
Pages989-990
Number of pages2
Volume1349
EditionPART A
DOIs
Publication statusPublished - 12-09-2011
Event55th DAE Solid State Physics Symposium 2010 - Manipal, India
Duration: 26-12-201030-12-2010

Conference

Conference55th DAE Solid State Physics Symposium 2010
CountryIndia
CityManipal
Period26-12-1030-12-10

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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    Kumar, N., Rao, A., & Awana, V. P. S. (2011). Mixed-exchange: Cr & Fe doped La0.7Ca0.3MnO 3. In Solid State Physics - Proceedings of the 55th DAE Solid State Physics Symposium 2010 (PART A ed., Vol. 1349, pp. 989-990) https://doi.org/10.1063/1.3606192