Observation of Cu spin fluctuations in high-Tc cuprate superconductor nanoparticles investigated by muon spin relaxation

Suci Winarsih; Faisal Budiman; Hirofumi Tanaka; Tadashi Adachi; Akihiro Koda; Yoichi Horibe; Budhy Kurniawan; Isao Watanabe; Risdiana Risdiana

doi:10.3390/nano11123450

Observation of Cu spin fluctuations in high-T_c cuprate superconductor nanoparticles investigated by muon spin relaxation

Suci Winarsih, Faisal Budiman, Hirofumi Tanaka, Tadashi Adachi, Akihiro Koda, Yoichi Horibe, Budhy Kurniawan, Isao Watanabe, Risdiana Risdiana

Department of Physics

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

6 Citations (Scopus)

Abstract

The nano-size effects of high-T_c cuprate superconductor La_2−xSr_xCuO₄ with x = 0.20 are investigated using X-ray diffractometry, Transmission electron microscopy, and muon-spin relaxation (µSR). It is investigated whether an increase in the bond distance of Cu and O atoms in the conducting layer compared to those of the bulk state might affect its physical and magnetic properties. The µSR measurements revealed the slowing down of Cu spin fluctuations in La_2−xSr_xCuO₄ nanoparticles, indicating the development of a magnetic correlation at low temperatures. The magnetic correlation strengthens as the particle size reduces. This significantly differs from those observed in the bulk form, which show a superconducting state below T_c. It is indicated that reducing the particle size of La_2−xSr_xCuO₄ down to nanometer size causes the appearance of magnetism. The magnetism enhances with decreasing particle size.

Original language	English
Article number	3450
Journal	Nanomaterials
Volume	11
Issue number	12
DOIs	https://doi.org/10.3390/nano11123450
Publication status	Published - Dec 2021

Keywords

Cu spin fluctuations
High-T cuprate superconductor
Magnetic correlation
Muon-spin relaxation
Nano-size effects

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@article{e808e7ef4e74431d98dcdaf4b128d3ba,

title = "Observation of Cu spin fluctuations in high-Tc cuprate superconductor nanoparticles investigated by muon spin relaxation",

abstract = "The nano-size effects of high-Tc cuprate superconductor La2−xSrxCuO4 with x = 0.20 are investigated using X-ray diffractometry, Transmission electron microscopy, and muon-spin relaxation (µSR). It is investigated whether an increase in the bond distance of Cu and O atoms in the conducting layer compared to those of the bulk state might affect its physical and magnetic properties. The µSR measurements revealed the slowing down of Cu spin fluctuations in La2−xSrxCuO4 nanoparticles, indicating the development of a magnetic correlation at low temperatures. The magnetic correlation strengthens as the particle size reduces. This significantly differs from those observed in the bulk form, which show a superconducting state below Tc. It is indicated that reducing the particle size of La2−xSrxCuO4 down to nanometer size causes the appearance of magnetism. The magnetism enhances with decreasing particle size.",

keywords = "Cu spin fluctuations, High-T cuprate superconductor, Magnetic correlation, Muon-spin relaxation, Nano-size effects",

author = "Suci Winarsih and Faisal Budiman and Hirofumi Tanaka and Tadashi Adachi and Akihiro Koda and Yoichi Horibe and Budhy Kurniawan and Isao Watanabe and Risdiana Risdiana",

note = "Funding Information: Funding: This work was supported by International Program Associate of RIKEN and the Academic Leadership Grant of Padjadjaran University No. 1959/UN6.3.1/PT.00/2021. One of the authors (S.W.) is supported by the Post-Doctoral Research Grant of Padjadjaran University under contract number 3570/UN6.3.3/LT/2020. Publisher Copyright: {\textcopyright} 2021 by the authors. Licensee MDPI, Basel, Switzerland.",

year = "2021",

month = dec,

doi = "10.3390/nano11123450",

language = "English",

volume = "11",

journal = "Nanomaterials",

issn = "2079-4991",

publisher = "Multidisciplinary Digital Publishing Institute (MDPI)",

number = "12",

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TY - JOUR

T1 - Observation of Cu spin fluctuations in high-Tc cuprate superconductor nanoparticles investigated by muon spin relaxation

AU - Winarsih, Suci

AU - Budiman, Faisal

AU - Tanaka, Hirofumi

AU - Adachi, Tadashi

AU - Koda, Akihiro

AU - Horibe, Yoichi

AU - Kurniawan, Budhy

AU - Watanabe, Isao

AU - Risdiana, Risdiana

N1 - Funding Information: Funding: This work was supported by International Program Associate of RIKEN and the Academic Leadership Grant of Padjadjaran University No. 1959/UN6.3.1/PT.00/2021. One of the authors (S.W.) is supported by the Post-Doctoral Research Grant of Padjadjaran University under contract number 3570/UN6.3.3/LT/2020. Publisher Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.

PY - 2021/12

Y1 - 2021/12

N2 - The nano-size effects of high-Tc cuprate superconductor La2−xSrxCuO4 with x = 0.20 are investigated using X-ray diffractometry, Transmission electron microscopy, and muon-spin relaxation (µSR). It is investigated whether an increase in the bond distance of Cu and O atoms in the conducting layer compared to those of the bulk state might affect its physical and magnetic properties. The µSR measurements revealed the slowing down of Cu spin fluctuations in La2−xSrxCuO4 nanoparticles, indicating the development of a magnetic correlation at low temperatures. The magnetic correlation strengthens as the particle size reduces. This significantly differs from those observed in the bulk form, which show a superconducting state below Tc. It is indicated that reducing the particle size of La2−xSrxCuO4 down to nanometer size causes the appearance of magnetism. The magnetism enhances with decreasing particle size.

AB - The nano-size effects of high-Tc cuprate superconductor La2−xSrxCuO4 with x = 0.20 are investigated using X-ray diffractometry, Transmission electron microscopy, and muon-spin relaxation (µSR). It is investigated whether an increase in the bond distance of Cu and O atoms in the conducting layer compared to those of the bulk state might affect its physical and magnetic properties. The µSR measurements revealed the slowing down of Cu spin fluctuations in La2−xSrxCuO4 nanoparticles, indicating the development of a magnetic correlation at low temperatures. The magnetic correlation strengthens as the particle size reduces. This significantly differs from those observed in the bulk form, which show a superconducting state below Tc. It is indicated that reducing the particle size of La2−xSrxCuO4 down to nanometer size causes the appearance of magnetism. The magnetism enhances with decreasing particle size.

KW - Cu spin fluctuations

KW - High-T cuprate superconductor

KW - Magnetic correlation

KW - Muon-spin relaxation

KW - Nano-size effects

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DO - 10.3390/nano11123450

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AN - SCOPUS:85121356452

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VL - 11

JO - Nanomaterials

JF - Nanomaterials

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ER -

Observation of Cu spin fluctuations in high-T_c cuprate superconductor nanoparticles investigated by muon spin relaxation

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Keywords

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