Abstract
We show from conventional magnetization measurements that the charge order (CO) is completely suppressed in 10 nm Pr{sub 0.5}Ca{sub 0.5}MnO{sub 3}(PCMO 10) nanoparticles. Novel magnetization measurements, designed by a special high field measurement protocol, show that the dominant ground state magnetic phase is ferromagnetic-metallic (FM-M), which is an equilibrium phase, which coexists with the residual charge ordered anti-ferromagnetic phase (CO AFM) (an arrested phase) and exhibits the characteristic features of a 'magnetic glassy state' at low temperatures. It is observed that there is a drastic reduction in the field required to induce the AFM to FM transition (approx5-6 T) compared to their bulk counterpart (approx27 T); this phase transition is of first order in nature, broad, irreversible and the coexisting phases are tunable with the cooling field. Temperature-dependent magneto-transport data indicate the occurrence of a size-induced insulator-metal transition (T{sub M} {sub -} {sub I}) and anomalous resistive hysteresis (R-H) loops, pointing out the presence of a mixture of the FM-M phase and AFM-I phase.
Rao, S S;
Bhat, S V, E-mail: ssrao@physics.iisc.ernet.i, E-mail: Srinivasarao.singamaneni@fys.kuleuven.b, E-mail: svbhat@physics.iisc.ernet.i
[1]
- Department of Physics, Indian Institute of Science, Bangalore-560012 (India)
Citation Formats
Rao, S S, and Bhat, S V, E-mail: ssrao@physics.iisc.ernet.i, E-mail: Srinivasarao.singamaneni@fys.kuleuven.b, E-mail: svbhat@physics.iisc.ernet.i.
Probing the existing magnetic phases in Pr{sub 0.5}Ca{sub 0.5}MnO{sub 3} (PCMO) nanowires and nanoparticles: magnetization and magneto-transport investigations.
United Kingdom: N. p.,
2010.
Web.
doi:10.1088/0953-8984/22/11/116004.
Rao, S S, & Bhat, S V, E-mail: ssrao@physics.iisc.ernet.i, E-mail: Srinivasarao.singamaneni@fys.kuleuven.b, E-mail: svbhat@physics.iisc.ernet.i.
Probing the existing magnetic phases in Pr{sub 0.5}Ca{sub 0.5}MnO{sub 3} (PCMO) nanowires and nanoparticles: magnetization and magneto-transport investigations.
United Kingdom.
https://doi.org/10.1088/0953-8984/22/11/116004
Rao, S S, and Bhat, S V, E-mail: ssrao@physics.iisc.ernet.i, E-mail: Srinivasarao.singamaneni@fys.kuleuven.b, E-mail: svbhat@physics.iisc.ernet.i.
2010.
"Probing the existing magnetic phases in Pr{sub 0.5}Ca{sub 0.5}MnO{sub 3} (PCMO) nanowires and nanoparticles: magnetization and magneto-transport investigations."
United Kingdom.
https://doi.org/10.1088/0953-8984/22/11/116004.
@misc{etde_21375830,
title = {Probing the existing magnetic phases in Pr{sub 0.5}Ca{sub 0.5}MnO{sub 3} (PCMO) nanowires and nanoparticles: magnetization and magneto-transport investigations}
author = {Rao, S S, and Bhat, S V, E-mail: ssrao@physics.iisc.ernet.i, E-mail: Srinivasarao.singamaneni@fys.kuleuven.b, E-mail: svbhat@physics.iisc.ernet.i}
abstractNote = {We show from conventional magnetization measurements that the charge order (CO) is completely suppressed in 10 nm Pr{sub 0.5}Ca{sub 0.5}MnO{sub 3}(PCMO 10) nanoparticles. Novel magnetization measurements, designed by a special high field measurement protocol, show that the dominant ground state magnetic phase is ferromagnetic-metallic (FM-M), which is an equilibrium phase, which coexists with the residual charge ordered anti-ferromagnetic phase (CO AFM) (an arrested phase) and exhibits the characteristic features of a 'magnetic glassy state' at low temperatures. It is observed that there is a drastic reduction in the field required to induce the AFM to FM transition (approx5-6 T) compared to their bulk counterpart (approx27 T); this phase transition is of first order in nature, broad, irreversible and the coexisting phases are tunable with the cooling field. Temperature-dependent magneto-transport data indicate the occurrence of a size-induced insulator-metal transition (T{sub M} {sub -} {sub I}) and anomalous resistive hysteresis (R-H) loops, pointing out the presence of a mixture of the FM-M phase and AFM-I phase.}
doi = {10.1088/0953-8984/22/11/116004}
journal = []
issue = {11}
volume = {22}
place = {United Kingdom}
year = {2010}
month = {Mar}
}
title = {Probing the existing magnetic phases in Pr{sub 0.5}Ca{sub 0.5}MnO{sub 3} (PCMO) nanowires and nanoparticles: magnetization and magneto-transport investigations}
author = {Rao, S S, and Bhat, S V, E-mail: ssrao@physics.iisc.ernet.i, E-mail: Srinivasarao.singamaneni@fys.kuleuven.b, E-mail: svbhat@physics.iisc.ernet.i}
abstractNote = {We show from conventional magnetization measurements that the charge order (CO) is completely suppressed in 10 nm Pr{sub 0.5}Ca{sub 0.5}MnO{sub 3}(PCMO 10) nanoparticles. Novel magnetization measurements, designed by a special high field measurement protocol, show that the dominant ground state magnetic phase is ferromagnetic-metallic (FM-M), which is an equilibrium phase, which coexists with the residual charge ordered anti-ferromagnetic phase (CO AFM) (an arrested phase) and exhibits the characteristic features of a 'magnetic glassy state' at low temperatures. It is observed that there is a drastic reduction in the field required to induce the AFM to FM transition (approx5-6 T) compared to their bulk counterpart (approx27 T); this phase transition is of first order in nature, broad, irreversible and the coexisting phases are tunable with the cooling field. Temperature-dependent magneto-transport data indicate the occurrence of a size-induced insulator-metal transition (T{sub M} {sub -} {sub I}) and anomalous resistive hysteresis (R-H) loops, pointing out the presence of a mixture of the FM-M phase and AFM-I phase.}
doi = {10.1088/0953-8984/22/11/116004}
journal = []
issue = {11}
volume = {22}
place = {United Kingdom}
year = {2010}
month = {Mar}
}