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

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

doi:10.1063/1.3606192

Mixed-exchange: Cr & Fe doped La_0.7Ca_0.3MnO ₃

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

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Structural, electrical and magnetic studies of La_0.7Ca _0.3Mn_1-xCr_xO₃ and La _0.7Ca_0.3Mn₁-_xFe_xO ₃ manganites are studied here. With Cr and Fe-doping at Mn-site the T_IM 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 (T_IM). Magnetic measurements show the existence of magnetic polaron supported by increase in volume of unit cell.

Original language	English
Title of host publication	Solid State Physics - Proceedings of the 55th DAE Solid State Physics Symposium 2010
Pages	989-990
Number of pages	2
Volume	1349
Edition	PART A
DOIs	https://doi.org/10.1063/1.3606192
Publication status	Published - 12-09-2011
Event	55th DAE Solid State Physics Symposium 2010 - Manipal, India Duration: 26-12-2010 → 30-12-2010

Conference

Conference	55th DAE Solid State Physics Symposium 2010
Country/Territory	India
City	Manipal
Period	26-12-10 → 30-12-10

All Science Journal Classification (ASJC) codes

Physics and Astronomy(all)

Access to Document

10.1063/1.3606192

Cite this

@inproceedings{c55212a9a76844ec9bd8ceb2aeb32807,

title = "Mixed-exchange: Cr & Fe doped La0.7Ca0.3MnO 3",

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.",

author = "Neeraj Kumar and A. Rao and Awana, {V. P.S.}",

year = "2011",

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day = "12",

doi = "10.1063/1.3606192",

language = "English",

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volume = "1349",

pages = "989--990",

booktitle = "Solid State Physics - Proceedings of the 55th DAE Solid State Physics Symposium 2010",

edition = "PART A",

note = "55th DAE Solid State Physics Symposium 2010 ; Conference date: 26-12-2010 Through 30-12-2010",

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TY - GEN

T1 - Mixed-exchange

T2 - 55th DAE Solid State Physics Symposium 2010

AU - Kumar, Neeraj

AU - Rao, A.

AU - Awana, V. P.S.

PY - 2011/9/12

Y1 - 2011/9/12

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.

AB - 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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