Superconductivity of a calcium-doped graphite CaC 30

S. W. Han; J. D. Lee; J. P. Noh; D. W. Jung

doi:10.1007/s10909-010-0170-y

Superconductivity of a calcium-doped graphite CaC ₃₀

S. W. Han
, J. D. Lee
, J. P. Noh
, D. W. Jung

Department of Physics and Chemistry

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

5 Scopus citations

Abstract

We report the results of a dc magnetization study of the graphite doped with Ca atoms (CaC ₃₀). A Ca-doped graphite was prepared in an ultra-high vacuum (UHV) chamber without lithium atoms used for making bulk CaC ₆. The superconducting transition temperature (T _SC) was about 9.2 K, which is lower than that of CaC ₆ (11.5 K). Further, at a 50 mT, the second transition occurs at higher temperatures in ZFC and FC, viz. 250 K in ZFC and 130 K in FC.

Original language	English
Pages (from-to)	41-48
Number of pages	8
Journal	Journal of Low Temperature Physics
Volume	160
Issue number	1-2
DOIs	https://doi.org/10.1007/s10909-010-0170-y
State	Published - Jul 2010

Bibliographical note

Funding Information:
Acknowledgements I would like to thank W.-F. Pong, K.-H. Chen, R. Friedlein, Y. Yamada-Takamura, H. Iwasaki, and H. Meissner for their essential technical support. This work was supported by Special Coordination Funds for Promoting Science and Technology from MEXT, Japan.

Keywords

Graphite intercalation compounds
Layered systems
Superconductivity

Access to Document

10.1007/s10909-010-0170-y

Cite this

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title = "Superconductivity of a calcium-doped graphite CaC 30 ",

abstract = "We report the results of a dc magnetization study of the graphite doped with Ca atoms (CaC 30). A Ca-doped graphite was prepared in an ultra-high vacuum (UHV) chamber without lithium atoms used for making bulk CaC 6. The superconducting transition temperature (T SC) was about 9.2 K, which is lower than that of CaC 6 (11.5 K). Further, at a 50 mT, the second transition occurs at higher temperatures in ZFC and FC, viz. 250 K in ZFC and 130 K in FC.",

keywords = "Graphite intercalation compounds, Layered systems, Superconductivity",

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note = "Funding Information: Acknowledgements I would like to thank W.-F. Pong, K.-H. Chen, R. Friedlein, Y. Yamada-Takamura, H. Iwasaki, and H. Meissner for their essential technical support. This work was supported by Special Coordination Funds for Promoting Science and Technology from MEXT, Japan.",

year = "2010",

month = jul,

doi = "10.1007/s10909-010-0170-y",

language = "English",

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AU - Han, S. W.

AU - Lee, J. D.

AU - Noh, J. P.

AU - Jung, D. W.

N1 - Funding Information: Acknowledgements I would like to thank W.-F. Pong, K.-H. Chen, R. Friedlein, Y. Yamada-Takamura, H. Iwasaki, and H. Meissner for their essential technical support. This work was supported by Special Coordination Funds for Promoting Science and Technology from MEXT, Japan.

PY - 2010/7

Y1 - 2010/7

N2 - We report the results of a dc magnetization study of the graphite doped with Ca atoms (CaC 30). A Ca-doped graphite was prepared in an ultra-high vacuum (UHV) chamber without lithium atoms used for making bulk CaC 6. The superconducting transition temperature (T SC) was about 9.2 K, which is lower than that of CaC 6 (11.5 K). Further, at a 50 mT, the second transition occurs at higher temperatures in ZFC and FC, viz. 250 K in ZFC and 130 K in FC.

AB - We report the results of a dc magnetization study of the graphite doped with Ca atoms (CaC 30). A Ca-doped graphite was prepared in an ultra-high vacuum (UHV) chamber without lithium atoms used for making bulk CaC 6. The superconducting transition temperature (T SC) was about 9.2 K, which is lower than that of CaC 6 (11.5 K). Further, at a 50 mT, the second transition occurs at higher temperatures in ZFC and FC, viz. 250 K in ZFC and 130 K in FC.

KW - Graphite intercalation compounds

KW - Layered systems

KW - Superconductivity

UR - https://www.scopus.com/pages/publications/77952958805

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DO - 10.1007/s10909-010-0170-y

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