TY - GEN
T1 - Enhanced room-temperature ferromagnetism in superconducting pr2-xcexcuo4 nanoparticles
AU - Baqiya, Malik Anjelh
AU - Putra, Putu Eka Dharma
AU - Irfanita, Resky
AU - Suasmoro,
AU - Darminto,
AU - Kawamata, Takayuki
AU - Noji, Takashi
AU - Sato, Hidetaka
AU - Kato, Masatsune
AU - Koike, Yoji
N1 - Funding Information:
This work was funded by the project of “Penelitian Dasar Unggulan Perguruan Tinggi ITS Surabaya 2017-2018” from Ministry of Research, Technology and Higher Education of the Republic of Indonesia, DRPM, KEMENRISTEKDIKTI, Indonesia.
Publisher Copyright:
© 2019 Trans Tech Publications Ltd, Switzerland.
PY - 2019
Y1 - 2019
N2 - Recently, the so-called room-temperature ferromagnetism in any nanoparticles has been studied intensively. It is well known that the properties of ferromagnetism and superconductivity are contradictory in a superconducting high-Tc cuprate. The existence of ferromagnetism in the nanoparticles has been suggested to occur on the surface. This magnetism has been expected to come from defects inducing magnetic moments on oxygen vacancies at the surface of the nanoparticles. This work is to observe magnetism in nanosized superconducting Pr2-xCexCuO4 (PCCO) with x = 0.15 by means of a superconducting quantum interference device (SQUID). The magnetization curves of the reduced PCCO nanoparticles with the superconducting transition temperature, Tc, of ~25 K have revealed that there is weak ferromagnetism observed at room temperature. The magnitude of magnetization could be enhanced by oxygen reduction annealing in vacuum with increasing annealing temperature. A non-linear magnetization occurring in the reduced PCCO nanoparticles through the vacuum annealing process is probably due to a strong oxygen reduction producing more oxygen vacancies in the T'-structure.
AB - Recently, the so-called room-temperature ferromagnetism in any nanoparticles has been studied intensively. It is well known that the properties of ferromagnetism and superconductivity are contradictory in a superconducting high-Tc cuprate. The existence of ferromagnetism in the nanoparticles has been suggested to occur on the surface. This magnetism has been expected to come from defects inducing magnetic moments on oxygen vacancies at the surface of the nanoparticles. This work is to observe magnetism in nanosized superconducting Pr2-xCexCuO4 (PCCO) with x = 0.15 by means of a superconducting quantum interference device (SQUID). The magnetization curves of the reduced PCCO nanoparticles with the superconducting transition temperature, Tc, of ~25 K have revealed that there is weak ferromagnetism observed at room temperature. The magnitude of magnetization could be enhanced by oxygen reduction annealing in vacuum with increasing annealing temperature. A non-linear magnetization occurring in the reduced PCCO nanoparticles through the vacuum annealing process is probably due to a strong oxygen reduction producing more oxygen vacancies in the T'-structure.
KW - Magnetic properties
KW - Nanocrystals
KW - Oxygen vacancy
KW - PrCeCuO
KW - Weak Ferromagnetism
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UR - http://www.scopus.com/inward/citedby.url?scp=85071947281&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/MSF.966.263
DO - 10.4028/www.scientific.net/MSF.966.263
M3 - Conference contribution
AN - SCOPUS:85071947281
SN - 9783035714968
T3 - Materials Science Forum
SP - 263
EP - 268
BT - Functional Properties of Modern Materials II
A2 - Darminto, null
A2 - Kurniawan, Budhy
A2 - Risdiana, null
A2 - Watanabe, Isao
A2 - Nugroho, Agustinus Agung
PB - Trans Tech Publications Ltd
T2 - 4th International Conference on Functional Materials Science, ICFMS 2018
Y2 - 13 November 2018 through 15 November 2018
ER -