Electron magnetic resonance (EMR) study of electron-hole asymmetry in La1-xCaxMnO3 manganites (x=0.2,0.8)

A. I. Shames; E. Rozenberg; M. Auslender; G. Gorodetsky; C. Martin; A. Maignan; Ya M. Mukovskii

doi:10.1016/j.jmmm.2004.11.287

Electron magnetic resonance (EMR) study of electron-hole asymmetry in La_1-xCa_xMnO₃ manganites (x=0.2,0.8)

A. I. Shames, E. Rozenberg, M. Auslender, G. Gorodetsky, C. Martin, A. Maignan, Ya M. Mukovskii

Research output: Contribution to journal › Article › peer-review

20 Scopus citations

Abstract

X-band EMR measurements on powdered samples of single-crystalline La _0.8Ca_0.2MnO₃ and polycrystalline La _0.2Ca_0.8MnO₃ manganites were carried out at 120≤T≤500 K aiming to study the effect of the electron-hole doping asymmetry in La_1-xCa_xMnO₃ system. In the paramagnetic (PM) state both compounds differ in the nature of short-range magnetic orderings observed - clusters of double-exchange coupled Mn ³⁺-Mn⁴⁺ ions and magneto-impurity-like clusters in the La_0.8Ca_0.2MnO₃ and La_0.2Ca _0.8MnO₃ compounds, respectively. Ferromagnetic ground state of La_0.8Ca_0.2MnO₃ is characterized by the coexistence of orbitally ordered Mn³⁺ subsystem and Mn⁴⁺ with band-like carriers one, which are responsible for the multiline EMR spectra. Charge-ordered antiferromagnetic ground state of La _0.2Ca_0.8MnO₃ causes a sharp decrease in intensity and then vanishing of the EMR signal observed in the PM region.

Original language	English
Pages (from-to)	910-913
Number of pages	4
Journal	Journal of Magnetism and Magnetic Materials
Volume	290-291 PART 2
DOIs	https://doi.org/10.1016/j.jmmm.2004.11.287
State	Published - 1 Apr 2005

Keywords

Electron and hole-doped manganites
Ferromagnetic and electron paramagnetic resonance

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

Access to Document

10.1016/j.jmmm.2004.11.287

Cite this

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title = "Electron magnetic resonance (EMR) study of electron-hole asymmetry in La1-xCaxMnO3 manganites (x=0.2,0.8)",

abstract = "X-band EMR measurements on powdered samples of single-crystalline La 0.8Ca0.2MnO3 and polycrystalline La 0.2Ca0.8MnO3 manganites were carried out at 120≤T≤500 K aiming to study the effect of the electron-hole doping asymmetry in La1-xCaxMnO3 system. In the paramagnetic (PM) state both compounds differ in the nature of short-range magnetic orderings observed - clusters of double-exchange coupled Mn 3+-Mn4+ ions and magneto-impurity-like clusters in the La0.8Ca0.2MnO3 and La0.2Ca 0.8MnO3 compounds, respectively. Ferromagnetic ground state of La0.8Ca0.2MnO3 is characterized by the coexistence of orbitally ordered Mn3+ subsystem and Mn4+ with band-like carriers one, which are responsible for the multiline EMR spectra. Charge-ordered antiferromagnetic ground state of La 0.2Ca0.8MnO3 causes a sharp decrease in intensity and then vanishing of the EMR signal observed in the PM region.",

keywords = "Electron and hole-doped manganites, Ferromagnetic and electron paramagnetic resonance",

author = "Shames, {A. I.} and E. Rozenberg and M. Auslender and G. Gorodetsky and C. Martin and A. Maignan and Mukovskii, {Ya M.}",

note = "Funding Information: This work was supported by the ISF Grant 209/01. ",

year = "2005",

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doi = "10.1016/j.jmmm.2004.11.287",

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T1 - Electron magnetic resonance (EMR) study of electron-hole asymmetry in La1-xCaxMnO3 manganites (x=0.2,0.8)

AU - Shames, A. I.

AU - Rozenberg, E.

AU - Auslender, M.

AU - Gorodetsky, G.

AU - Martin, C.

AU - Maignan, A.

AU - Mukovskii, Ya M.

N1 - Funding Information: This work was supported by the ISF Grant 209/01.

PY - 2005/4/1

Y1 - 2005/4/1

N2 - X-band EMR measurements on powdered samples of single-crystalline La 0.8Ca0.2MnO3 and polycrystalline La 0.2Ca0.8MnO3 manganites were carried out at 120≤T≤500 K aiming to study the effect of the electron-hole doping asymmetry in La1-xCaxMnO3 system. In the paramagnetic (PM) state both compounds differ in the nature of short-range magnetic orderings observed - clusters of double-exchange coupled Mn 3+-Mn4+ ions and magneto-impurity-like clusters in the La0.8Ca0.2MnO3 and La0.2Ca 0.8MnO3 compounds, respectively. Ferromagnetic ground state of La0.8Ca0.2MnO3 is characterized by the coexistence of orbitally ordered Mn3+ subsystem and Mn4+ with band-like carriers one, which are responsible for the multiline EMR spectra. Charge-ordered antiferromagnetic ground state of La 0.2Ca0.8MnO3 causes a sharp decrease in intensity and then vanishing of the EMR signal observed in the PM region.

AB - X-band EMR measurements on powdered samples of single-crystalline La 0.8Ca0.2MnO3 and polycrystalline La 0.2Ca0.8MnO3 manganites were carried out at 120≤T≤500 K aiming to study the effect of the electron-hole doping asymmetry in La1-xCaxMnO3 system. In the paramagnetic (PM) state both compounds differ in the nature of short-range magnetic orderings observed - clusters of double-exchange coupled Mn 3+-Mn4+ ions and magneto-impurity-like clusters in the La0.8Ca0.2MnO3 and La0.2Ca 0.8MnO3 compounds, respectively. Ferromagnetic ground state of La0.8Ca0.2MnO3 is characterized by the coexistence of orbitally ordered Mn3+ subsystem and Mn4+ with band-like carriers one, which are responsible for the multiline EMR spectra. Charge-ordered antiferromagnetic ground state of La 0.2Ca0.8MnO3 causes a sharp decrease in intensity and then vanishing of the EMR signal observed in the PM region.

KW - Electron and hole-doped manganites

KW - Ferromagnetic and electron paramagnetic resonance

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