A ^{55}Mn NMR Study of La_{0.33}Nd_{0.33}Ca_{0.34}Mn O_3 with ^{16}O and ^{18}O

• Authors: D. Rybicki , Cz. Kapusta , P. Riedi , C. Oates , M. Sikora , D. Zając , J. De Teresa , C. Marquina , M. Ibarra
• Languages of publication: EN

Abstracts

EN

A ^{55}Mn NMR study of ^{16}O and ^{18}O containing La_{0.33}Nd_{0.33}Ca_{0.34}Mn O_3 is reported. The spin-echo spectra measured at 4.2 K and zero field consist of a double exchange line corresponding to the ferromagnetic metallic regions. The line intensity is more than an order of magnitude lower for the ^{18}O compound, which indicates an order of magnitude lower content of the ferromagnetic metallic phase in this compound. The frequency dependence of the spin-spin relaxation time T_2 shows a pronounced minimum at the center of the double exchange line of both compounds due to the Suhl-Nakamura interaction, which indicates that the ferromagnetic metallic regions are at least 10~nm in size. The results are discussed in terms of the influence of oxygen isotopic substitution on phase segregation.

Keywords

EN

76.60.-k; 75.47.Gk

Discipline

• 76.60.-k: Nuclear magnetic resonance and relaxation(see also 33.25.+k Nuclear resonance and relaxation in atomic and molecular physics and 82.56.-b Nuclear magnetic resonance in physical chemistry and chemical physics; for structure determination using magnetic resonance techniques, see 61.05.Qr; for biophysical applications, see 87.80.Lg; for NMR in superconducting materials, see 74.25.nj)
• 75.47.Gk: Colossal magnetoresistance

• Journal: Acta Physica Polonica A
• Year: 2004
• Volume: 105
• Issue: 1-2
• Pages: 183-188

Dates

published

2004-01/02

received

2003-09-15

Contributors

author

D. Rybicki

• Department of Solid State Physics, Faculty of Physics and Nuclear Techniques, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Cracow, Poland

author

Cz. Kapusta

• Department of Solid State Physics, Faculty of Physics and Nuclear Techniques, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Cracow, Poland

author

P. Riedi

• Department of Physics and Astronomy, University of St. Andrews, St. Andrews, KY16 9SS, Scotland, United Kingdom

author

C. Oates

• Department of Solid State Physics, Faculty of Physics and Nuclear Techniques, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Cracow, Poland

author

M. Sikora

• Department of Solid State Physics, Faculty of Physics and Nuclear Techniques, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Cracow, Poland

author

D. Zając

• Department of Solid State Physics, Faculty of Physics and Nuclear Techniques, AGH University of Science and Technology, Al. Mickiewicza 30, 30-059 Cracow, Poland

author

J. De Teresa

• Instituto de Ciencias de Materiales de Aragon, Universidad de Zaragoza CSIC, 50009 Zaragoza, Spain

author

C. Marquina

• Instituto de Ciencias de Materiales de Aragon, Universidad de Zaragoza CSIC, 50009 Zaragoza, Spain

author

M. Ibarra

• Instituto de Ciencias de Materiales de Aragon, Universidad de Zaragoza CSIC, 50009 Zaragoza, Spain

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Identifiers

DOI

10.12693/APhysPolA.105.183