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Buntar, V.; Buntar, A. G.

doi:10.1103/physrevb.51.1311

Cited by 5 publications

(2 citation statements)

References 12 publications

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“…The value for recently determined by magnetic susceptibility measurements for K 3 C 60 single crystals is ϳ853 nm on average, which distributes in a range of 770-1020 nm. 40 This value leads to ␦ dia ϭ3.2 ppm and ␦ iso ϭ151 ppm, supporting assumptions ͑2͒ and ͑3͒.…”

Section: ͑11͒supporting

confidence: 62%

Analysis of13C−NMRspectra inC
Sato
¹
,
Tou
²
,
Maniwa
³

et al. 1998
Phys. Rev. B
15
4
9
0
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A 13 C-NMR anisotropic hyperfine coupling tensor was determined as 2(Ϫ1.68, Ϫ1.68, 3.37) ϫ10 6 rad/sec for C 60 3Ϫ in A 3 C 60 superconductors, where A is an alkali metal, by analyzing 13 C-NMR spectra below 85 K. Combined with an isotropic coupling constant of (2ϫ0.69)ϫ10 6 rad/sec, the 2s and 2p characters of the electronic wave functions at the Fermi level were deduced. The results were compatible with local-density-approximation band calculations. From a simulation of 13 C-NMR spectra at superconducting state, the traceless chemical ͑orbital͒ shift tensor and isotropic chemical shift were determined as ͑67, 34, Ϫ101͒ ppm and ϳ150 ppm, respectively. An estimated magnetic penetration depth is larger than 570 nm in K 3 C 60. Furthermore, the modified Korringa relation, T 1 TK 2 ϳ␤S ͑with Knight shift K, spin-lattice relaxation time T 1 , and Korringa constant S͒, clearly showed the existence of weak but substantial antiferromagnetic spin fluctuation in A 3 C 60 ; ␤ϭ0.40-0.58 with an error of Ϯ20%. The Stoner enhancement factor was also determined as 1-1.5 from a comparison between spin susceptibility obtained from NMR and band-calculation results.

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Section: ͑11͒supporting

confidence: 62%

Analysis of13C−NMRspectra inC
Sato
¹
,
Tou
²
,
Maniwa
³

et al. 1998
Phys. Rev. B
15
4
9
0
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“…Although several years have passed since the discovery of superconductivity in fullerenes, 2 only a few results on flux pinning 20,21 and magnetic relaxation 6,[22][23][24] were published. In Refs.…”

Section: Introductionmentioning

confidence: 99%

Mixed-state parameters and vortex pinning in single-crystallineK3C60fullerene superconductors

et al. 1997

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We report on detailed magnetic investigations of big K 3 C 60 single crystals with sizes of ϳ1 mm. The samples were characterized by x-ray analysis, neutron diffraction, and ac magnetization measurements. The temperature dependence of the upper and lower critical fields was obtained, the latter by the trapped magneticmoment method. The coherence length and the penetration depth at Tϭ0 and close to the transition temperature were evaluated. The magnetic field and the temperature dependence of the critical current density were studied and the irreversibility lines determined. Long-term magnetic relaxation, measured in a wide range of temperatures and magnetic fields, allowed us to obtain the temperature dependence of the relaxation rate and the flux creep activation energy at different magnetic fields. The influence of sample inhomogeneities on all these properties was investigated. The results are compared to those obtained on powder and polycrystalline samples.

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Effect of fast neutron irradiation on magnetic properties of fullerene superconductor Rb3C60

Kubo

Terai

Suzuki

et al. 2009

Physica C: Superconductivity

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Influence of thermal fluctuations on single-vortex pinning inRb3C60

Cited by 5 publications

References 12 publications

Analysis of13C−NMRspectra inC
Sato
¹
,
Tou
²
,
Maniwa
³

et al. 1998
Phys. Rev. B
15
4
9
0
View full text Add to dashboard Cite

Analysis of13C−NMRspectra inC
Sato
¹
,
Tou
²
,
Maniwa
³

et al. 1998
Phys. Rev. B
15
4
9
0
View full text Add to dashboard Cite

Mixed-state parameters and vortex pinning in single-crystallineK3C60fullerene superconductors

Effect of fast neutron irradiation on magnetic properties of fullerene superconductor Rb3C60

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Influence of thermal fluctuations on single-vortex pinning inRb3C60

Cited by 5 publications

References 12 publications

Analysis of13C−NMRspectra inCSato1, Tou2, Maniwa3 et al. 1998Phys. Rev. B15490View full textAdd to dashboardCite

Analysis of13C−NMRspectra inCSato1, Tou2, Maniwa3 et al. 1998Phys. Rev. B15490View full textAdd to dashboardCite

Mixed-state parameters and vortex pinning in single-crystallineK3C60fullerene superconductors

Effect of fast neutron irradiation on magnetic properties of fullerene superconductor Rb3C60

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Analysis of13C−NMRspectra inC
Sato
¹
,
Tou
²
,
Maniwa
³

et al. 1998
Phys. Rev. B
15
4
9
0
View full text Add to dashboard Cite

Analysis of13C−NMRspectra inC
Sato
¹
,
Tou
²
,
Maniwa
³

et al. 1998
Phys. Rev. B
15
4
9
0
View full text Add to dashboard Cite