Abstract
An NMR study of polycrystalline Pr{sub 0.}5Ca{sub 0.5}Mn{sub 1-x}Ga{sub x}O{sub 3} (x = 0 and 0.03) at 3 K is presented. Zero field spin echo spectra of the Ga doped compound consist of an overlapping {sup 6:}9{sup ,71}Ga signal at 74 MHz (hyperfine field of 5.3 T), a {sup 55}Mn double exchange line at 375 MHz (35.5 T) and a weak Mn{sup 3+} signal between 400 and 550 MHz. Measurements in an applied field show a step-like increase in the double exchange line intensity, which corresponds to an increase in the amount of the ferromagnetic metallic phase. This coincides with a step-like feature in the bulk magnetization measurements. The effect is similar to that in the previous field dependent {sup 55}Mn NMR measurements of Pr{sub 0.67}Ca{sub 0.33} MnO{sub 3}. At the demagnetized and remanent state, a variation of spin-spin relaxation time T{sub 2}, across the {sup 55}Mn line, due to a Suhl-Nakamura interaction is observed, which suggests that the ferromagnetic metallic double exchange regions, at liquid helium temperatures, are at least 4 nm in size.
Oates, C J;
Sikora, M;
Zajac, D;
Rybicki, D;
[1]
Kapusta, Cz;
[1]
Department of Physics and Astronomy, University of St. Andrews, St. Andrews (United Kingdom)];
Riedi, P C;
[2]
Martin, C;
Yaicle, M;
Maignan, A
[3]
- Department of Solid State Physics, Faculty of Physics and Nuclear Techniques, AGH University of Science and Technology, Cracow (Poland)
- Department of Physics and Astronomy, University of St. Andrews, St. Andrews (United Kingdom)
- Laboratoire CRISMAT - UMR 6508, ISMRA et Universite de Cean, Cean (France)
Citation Formats
Oates, C J, Sikora, M, Zajac, D, Rybicki, D, Kapusta, Cz, Department of Physics and Astronomy, University of St. Andrews, St. Andrews (United Kingdom)], Riedi, P C, Martin, C, Yaicle, M, and Maignan, A.
An NMR study of Pr{sub 0.5}Ca{sub 0.5}Mn{sub 1-x}Ga{sub x}O{sub 3} (x = 0 and 0.03).
Poland: N. p.,
2004.
Web.
Oates, C J, Sikora, M, Zajac, D, Rybicki, D, Kapusta, Cz, Department of Physics and Astronomy, University of St. Andrews, St. Andrews (United Kingdom)], Riedi, P C, Martin, C, Yaicle, M, & Maignan, A.
An NMR study of Pr{sub 0.5}Ca{sub 0.5}Mn{sub 1-x}Ga{sub x}O{sub 3} (x = 0 and 0.03).
Poland.
Oates, C J, Sikora, M, Zajac, D, Rybicki, D, Kapusta, Cz, Department of Physics and Astronomy, University of St. Andrews, St. Andrews (United Kingdom)], Riedi, P C, Martin, C, Yaicle, M, and Maignan, A.
2004.
"An NMR study of Pr{sub 0.5}Ca{sub 0.5}Mn{sub 1-x}Ga{sub x}O{sub 3} (x = 0 and 0.03)."
Poland.
@misc{etde_20617058,
title = {An NMR study of Pr{sub 0.5}Ca{sub 0.5}Mn{sub 1-x}Ga{sub x}O{sub 3} (x = 0 and 0.03)}
author = {Oates, C J, Sikora, M, Zajac, D, Rybicki, D, Kapusta, Cz, Department of Physics and Astronomy, University of St. Andrews, St. Andrews (United Kingdom)], Riedi, P C, Martin, C, Yaicle, M, and Maignan, A}
abstractNote = {An NMR study of polycrystalline Pr{sub 0.}5Ca{sub 0.5}Mn{sub 1-x}Ga{sub x}O{sub 3} (x = 0 and 0.03) at 3 K is presented. Zero field spin echo spectra of the Ga doped compound consist of an overlapping {sup 6:}9{sup ,71}Ga signal at 74 MHz (hyperfine field of 5.3 T), a {sup 55}Mn double exchange line at 375 MHz (35.5 T) and a weak Mn{sup 3+} signal between 400 and 550 MHz. Measurements in an applied field show a step-like increase in the double exchange line intensity, which corresponds to an increase in the amount of the ferromagnetic metallic phase. This coincides with a step-like feature in the bulk magnetization measurements. The effect is similar to that in the previous field dependent {sup 55}Mn NMR measurements of Pr{sub 0.67}Ca{sub 0.33} MnO{sub 3}. At the demagnetized and remanent state, a variation of spin-spin relaxation time T{sub 2}, across the {sup 55}Mn line, due to a Suhl-Nakamura interaction is observed, which suggests that the ferromagnetic metallic double exchange regions, at liquid helium temperatures, are at least 4 nm in size.}
journal = []
issue = {1-2}
volume = {105}
journal type = {AC}
place = {Poland}
year = {2004}
month = {Jul}
}
title = {An NMR study of Pr{sub 0.5}Ca{sub 0.5}Mn{sub 1-x}Ga{sub x}O{sub 3} (x = 0 and 0.03)}
author = {Oates, C J, Sikora, M, Zajac, D, Rybicki, D, Kapusta, Cz, Department of Physics and Astronomy, University of St. Andrews, St. Andrews (United Kingdom)], Riedi, P C, Martin, C, Yaicle, M, and Maignan, A}
abstractNote = {An NMR study of polycrystalline Pr{sub 0.}5Ca{sub 0.5}Mn{sub 1-x}Ga{sub x}O{sub 3} (x = 0 and 0.03) at 3 K is presented. Zero field spin echo spectra of the Ga doped compound consist of an overlapping {sup 6:}9{sup ,71}Ga signal at 74 MHz (hyperfine field of 5.3 T), a {sup 55}Mn double exchange line at 375 MHz (35.5 T) and a weak Mn{sup 3+} signal between 400 and 550 MHz. Measurements in an applied field show a step-like increase in the double exchange line intensity, which corresponds to an increase in the amount of the ferromagnetic metallic phase. This coincides with a step-like feature in the bulk magnetization measurements. The effect is similar to that in the previous field dependent {sup 55}Mn NMR measurements of Pr{sub 0.67}Ca{sub 0.33} MnO{sub 3}. At the demagnetized and remanent state, a variation of spin-spin relaxation time T{sub 2}, across the {sup 55}Mn line, due to a Suhl-Nakamura interaction is observed, which suggests that the ferromagnetic metallic double exchange regions, at liquid helium temperatures, are at least 4 nm in size.}
journal = []
issue = {1-2}
volume = {105}
journal type = {AC}
place = {Poland}
year = {2004}
month = {Jul}
}