X-ray diffraction and magnetic susceptibility of sodium fullerides NaxC60

Mototada Kobayashi; Nozomu Kimata; Satoshi Heguri

doi:10.1016/j.jpcs.2009.12.067

X-ray diffraction and magnetic susceptibility of sodium fullerides Na_xC₆₀

Mototada Kobayashi, Nozomu Kimata, Satoshi Heguri

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

3 Citations (Scopus)

Abstract

The X-ray diffraction (XRD), magnetic susceptibility and electron spin resonance (ESR) measurements have been carried out for Na_xC₆₀. The XRD profiles with x<4 can be assigned to a face-centered cubic (fcc) lattice, while those with 4≦x to a hexagonal one. The temperature dependence of magnetic susceptibility χ for Na_xC₆₀ using SQUID was fitted to the Curie law, and estimated temperature-independent component χ₀. The composition x dependence of the χ₀ for Na_xC₆₀ shows two maxima at around x=3 and x=10, and minimum at x=6. The absence of Pauli contribution at x=6 was confirmed using ESR. A trace of superconducting transition at 14 K has been found for some Na_xC₆₀ specimens with 8<x<9.

Original language	English
Pages (from-to)	689-691
Number of pages	3
Journal	Journal of Physics and Chemistry of Solids
Volume	71
Issue number	4
DOIs	https://doi.org/10.1016/j.jpcs.2009.12.067
Publication status	Published - 2010 Apr

Keywords

A. Fullerenes
B. Chemical synthesis
D. Crystal structure
Magnetic properties
Superconductivity

ASJC Scopus subject areas

Chemistry(all)
Materials Science(all)
Condensed Matter Physics

Access to Document

10.1016/j.jpcs.2009.12.067

Cite this

@article{d039bfb829f54f14b51b7ce6d2a49e7d,

title = "X-ray diffraction and magnetic susceptibility of sodium fullerides NaxC60",

abstract = "The X-ray diffraction (XRD), magnetic susceptibility and electron spin resonance (ESR) measurements have been carried out for NaxC60. The XRD profiles with x<4 can be assigned to a face-centered cubic (fcc) lattice, while those with 4≦x to a hexagonal one. The temperature dependence of magnetic susceptibility χ for NaxC60 using SQUID was fitted to the Curie law, and estimated temperature-independent component χ0. The composition x dependence of the χ0 for NaxC60 shows two maxima at around x=3 and x=10, and minimum at x=6. The absence of Pauli contribution at x=6 was confirmed using ESR. A trace of superconducting transition at 14 K has been found for some NaxC60 specimens with 8",

keywords = "A. Fullerenes, B. Chemical synthesis, D. Crystal structure, Magnetic properties, Superconductivity",

author = "Mototada Kobayashi and Nozomu Kimata and Satoshi Heguri",

note = "Funding Information: The authors wish to thank Y.Kanazawa, H.Kawamura and Y.Akahama for valuable discussions. They also thank the Institute for Molecular Science (IMS); for assistance in performing X-ray diffraction and ESR measurements. This research was partly supported by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology, Japan.",

year = "2010",

month = apr,

doi = "10.1016/j.jpcs.2009.12.067",

language = "English",

volume = "71",

pages = "689--691",

journal = "Journal of Physics and Chemistry of Solids",

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AU - Kobayashi, Mototada

AU - Kimata, Nozomu

AU - Heguri, Satoshi

N1 - Funding Information: The authors wish to thank Y.Kanazawa, H.Kawamura and Y.Akahama for valuable discussions. They also thank the Institute for Molecular Science (IMS); for assistance in performing X-ray diffraction and ESR measurements. This research was partly supported by a Grant-in-Aid from the Ministry of Education, Culture, Sports, Science and Technology, Japan.

PY - 2010/4

Y1 - 2010/4

N2 - The X-ray diffraction (XRD), magnetic susceptibility and electron spin resonance (ESR) measurements have been carried out for NaxC60. The XRD profiles with x<4 can be assigned to a face-centered cubic (fcc) lattice, while those with 4≦x to a hexagonal one. The temperature dependence of magnetic susceptibility χ for NaxC60 using SQUID was fitted to the Curie law, and estimated temperature-independent component χ0. The composition x dependence of the χ0 for NaxC60 shows two maxima at around x=3 and x=10, and minimum at x=6. The absence of Pauli contribution at x=6 was confirmed using ESR. A trace of superconducting transition at 14 K has been found for some NaxC60 specimens with 8

AB - The X-ray diffraction (XRD), magnetic susceptibility and electron spin resonance (ESR) measurements have been carried out for NaxC60. The XRD profiles with x<4 can be assigned to a face-centered cubic (fcc) lattice, while those with 4≦x to a hexagonal one. The temperature dependence of magnetic susceptibility χ for NaxC60 using SQUID was fitted to the Curie law, and estimated temperature-independent component χ0. The composition x dependence of the χ0 for NaxC60 shows two maxima at around x=3 and x=10, and minimum at x=6. The absence of Pauli contribution at x=6 was confirmed using ESR. A trace of superconducting transition at 14 K has been found for some NaxC60 specimens with 8

KW - A. Fullerenes

KW - B. Chemical synthesis

KW - D. Crystal structure

KW - Magnetic properties

KW - Superconductivity

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