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

Fingerprint

transition temperature
ferromagnetism
magnetic measurement
ions
insulators
interactions
conduction
orbitals
cells
metals

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

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
Kumar, Neeraj ; Rao, A. ; Awana, V. P.S. / Mixed-exchange : Cr & Fe doped La0.7Ca0.3MnO 3. Solid State Physics - Proceedings of the 55th DAE Solid State Physics Symposium 2010. Vol. 1349 PART A. ed. 2011. pp. 989-990
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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.",
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Kumar, N, Rao, A & Awana, VPS 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 edn, vol. 1349, pp. 989-990, 55th DAE Solid State Physics Symposium 2010, Manipal, India, 26-12-10. https://doi.org/10.1063/1.3606192

Mixed-exchange : Cr & Fe doped La0.7Ca0.3MnO 3. / Kumar, Neeraj; Rao, A.; Awana, V. P.S.

Solid State Physics - Proceedings of the 55th DAE Solid State Physics Symposium 2010. Vol. 1349 PART A. ed. 2011. p. 989-990.

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

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N2 - 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.

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Kumar N, Rao A, Awana VPS. 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. 2011. p. 989-990 https://doi.org/10.1063/1.3606192