55Mn nuclear magnetic resonance study of highly Sr-doped La 2-2xSr1+2xMn2O7 (x=0.5-0.8)

D. Rybicki; Cz Kapusta; W. Tokarz; H. Štěpánková; V. Procházka; J. Haase; Z. Jirák; D. T. Adroja; J. F. Mitchell

doi:10.1103/PhysRevB.78.184428

⁵⁵Mn nuclear magnetic resonance study of highly Sr-doped La _2-2xSr_1+2xMn₂O₇ (x=0.5-0.8)

D. Rybicki, Cz Kapusta, W. Tokarz, H. Štěpánková, V. Procházka, J. Haase, Z. Jirák, D. T. Adroja, J. F. Mitchell

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

6 Citations (Scopus)

Abstract

The M 55 n nuclear magnetic resonance (NMR) study of bilayered perovskites La2-2x Sr1+2x Mn2 O7 with 0.5≤x≤1 is presented. The M 55 n spin-echo spectra were measured at 4.2 K at zero applied magnetic field and at fields up to 2.5 T. Recent neutron-diffraction studies report that all the compounds studied are antiferromagnetically ordered (except x=0.68 in which no long-range magnetic order was found). However, within the doping range 0.62≤x≤0.68, apart from NMR signal from antiferromagnetic insulating (AFI) phase, also lines from ferromagnetic insulating (FMI) and ferromagnetic metallic (FMM) phases are observed. This indicates that phase separation occurs in high Sr-doped bilayered manganites. The amount of the FMI and FMM regions decreases with the Sr doping level and for compounds with x=0.75 and x=0.8; only the line originating from nuclei in Mn4+ cations in AFI regions is observed.

Original language	English
Article number	184428
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	78
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevB.78.184428
Publication status	Published - 20 Nov 2008
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Condensed Matter Physics

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title = "55Mn nuclear magnetic resonance study of highly Sr-doped La 2-2xSr1+2xMn2O7 (x=0.5-0.8)",

abstract = "The M 55 n nuclear magnetic resonance (NMR) study of bilayered perovskites La2-2x Sr1+2x Mn2 O7 with 0.5≤x≤1 is presented. The M 55 n spin-echo spectra were measured at 4.2 K at zero applied magnetic field and at fields up to 2.5 T. Recent neutron-diffraction studies report that all the compounds studied are antiferromagnetically ordered (except x=0.68 in which no long-range magnetic order was found). However, within the doping range 0.62≤x≤0.68, apart from NMR signal from antiferromagnetic insulating (AFI) phase, also lines from ferromagnetic insulating (FMI) and ferromagnetic metallic (FMM) phases are observed. This indicates that phase separation occurs in high Sr-doped bilayered manganites. The amount of the FMI and FMM regions decreases with the Sr doping level and for compounds with x=0.75 and x=0.8; only the line originating from nuclei in Mn4+ cations in AFI regions is observed.",

author = "D. Rybicki and Cz Kapusta and W. Tokarz and H. {\v S}t{\v e}p{\'a}nkov{\'a} and V. Proch{\'a}zka and J. Haase and Z. Jir{\'a}k and Adroja, {D. T.} and Mitchell, {J. F.}",

year = "2008",

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doi = "10.1103/PhysRevB.78.184428",

language = "English",

volume = "78",

journal = "Physical Review B - Condensed Matter and Materials Physics",

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T1 - 55Mn nuclear magnetic resonance study of highly Sr-doped La 2-2xSr1+2xMn2O7 (x=0.5-0.8)

AU - Rybicki, D.

AU - Kapusta, Cz

AU - Tokarz, W.

AU - Štěpánková, H.

AU - Procházka, V.

AU - Haase, J.

AU - Jirák, Z.

AU - Adroja, D. T.

AU - Mitchell, J. F.

PY - 2008/11/20

Y1 - 2008/11/20

N2 - The M 55 n nuclear magnetic resonance (NMR) study of bilayered perovskites La2-2x Sr1+2x Mn2 O7 with 0.5≤x≤1 is presented. The M 55 n spin-echo spectra were measured at 4.2 K at zero applied magnetic field and at fields up to 2.5 T. Recent neutron-diffraction studies report that all the compounds studied are antiferromagnetically ordered (except x=0.68 in which no long-range magnetic order was found). However, within the doping range 0.62≤x≤0.68, apart from NMR signal from antiferromagnetic insulating (AFI) phase, also lines from ferromagnetic insulating (FMI) and ferromagnetic metallic (FMM) phases are observed. This indicates that phase separation occurs in high Sr-doped bilayered manganites. The amount of the FMI and FMM regions decreases with the Sr doping level and for compounds with x=0.75 and x=0.8; only the line originating from nuclei in Mn4+ cations in AFI regions is observed.

AB - The M 55 n nuclear magnetic resonance (NMR) study of bilayered perovskites La2-2x Sr1+2x Mn2 O7 with 0.5≤x≤1 is presented. The M 55 n spin-echo spectra were measured at 4.2 K at zero applied magnetic field and at fields up to 2.5 T. Recent neutron-diffraction studies report that all the compounds studied are antiferromagnetically ordered (except x=0.68 in which no long-range magnetic order was found). However, within the doping range 0.62≤x≤0.68, apart from NMR signal from antiferromagnetic insulating (AFI) phase, also lines from ferromagnetic insulating (FMI) and ferromagnetic metallic (FMM) phases are observed. This indicates that phase separation occurs in high Sr-doped bilayered manganites. The amount of the FMI and FMM regions decreases with the Sr doping level and for compounds with x=0.75 and x=0.8; only the line originating from nuclei in Mn4+ cations in AFI regions is observed.

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DO - 10.1103/PhysRevB.78.184428

M3 - Article

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SN - 1098-0121

VL - 78

JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 18

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ER -

⁵⁵Mn nuclear magnetic resonance study of highly Sr-doped La _2-2xSr_1+2xMn₂O₇ (x=0.5-0.8)

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