Demagnetizing fields in the de Haas-van Alphen effect

Crabtree, G. W.

doi:10.1103/physrevb.16.1117

Cited by 43 publications

(7 citation statements)

References 16 publications

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“…Exact value of D was obtainable only for ellipsoids. The ratio of length to diameter for our cylinder-like sample is about 0.6, then the average value of D for uniformly magnetized cylinders is 0.43 according to the results computed by Brown (1960) and Crabtree (1977). Thus, it can also be clearly observed that the value of magnetic susceptibility (χ) is about −1, corrected for the demagnetization factor.…”

Section: Resultssupporting

confidence: 72%

Superconducting Ti15Zr15Nb35Ta35 High-Entropy Alloy With Intermediate Electron-Phonon Coupling

Yuan

Luo

et al. 2018

Front. Mater.

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The body-centered cubic (BCC) Ti 15 Zr 15 Nb 35 Ta 35 high-entropy alloy showed superconducting behavior at around 8 K. The electronic specific heat coefficient γ and the lattice specific heat coefficient β were determined to be γ = 9.3 ± 0.1 mJ/mol K 2 and β = 0.28 ± 0.01 mJ/mol K 4 , respectively. It was found that the electronic specific heat C es does follow the exponential behavior of the Bardeen-Cooper-Schrieffer (BCS) theory. Nevertheless, the specific heat jump (C/γ T c) at the superconducting transition temperature which was determined to be 1.71 deviates appreciably from that for a weak electron-phonon coupling BCS superconductor. Within the framework of the strong-coupled theory, our analysis suggests that theTi 15 Zr 15 Nb 35 Ta 35 HEA is an intermediate electron-phonon coupled BCS-type superconductor.

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Section: Resultssupporting

confidence: 72%

Superconducting Ti15Zr15Nb35Ta35 High-Entropy Alloy With Intermediate Electron-Phonon Coupling

Yuan

Luo

et al. 2018

Front. Mater.

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“…In Eqs. (11) and (12), q is the density of the material, m is the speed of sound in the material, D is the crystal field splitting, D 1 an excited energy state not necessarily equal to D, and V 1 and V 2 are the first and second order strains of the electric potential, and h D is the Debye temperature. I 6 ðnÞ and I 8 ðnÞ are integrals defined by I k ðnÞ ¼ R n 0…”

Section: The Electron Longitudinal Relaxation Timementioning

confidence: 99%

“…For the special cases of a sphere, infinitely flat disc and infinitely long cylinder, we have n = 0, 1, and À1/2, respectively. For a cylinder of height h and diameter d, the shape factor only depends on the ratio h/d, and is given by [12]:…”

Section: The First Momentmentioning

confidence: 99%

Dynamic Nuclear Polarization of [1-13C]pyruvic acid at 4.6 tesla

Jóhannesson¹,

Macholl²,

Ardenkjær‐Larsen³

2009

Journal of Magnetic Resonance

134

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“…Numerical data for the demagnetization factor for the disk were taken from the literature. 42 In order to calculate the area and thickness, the dimensions of both -(ET) 2 Br and the reference sample were carefully measured with a high precision of 1%. The precision was verified by the following procedure.…”

Section: Experimental Techniquementioning

confidence: 99%

Influence of internal disorder on the superconducting state in the organic layered superconductorκ−(BEDT−TTF
Pinterić
¹
,
Tomić
²
,
Prester
³

et al. 2002
Phys. Rev. B
42
3
41
1
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We report high-sensitivity ac susceptibility measurements of the penetration depth in the Meissner state of the layered organic superconductor -(BEDT-TTF) 2 Cu͓N(CN) 2 ͔Br. We have studied nominally pure single crystals from the two different syntheses and employed controlled cooling procedures in order to minimize intrinsic remnant disorder at low temperatures associated with the glass transition, caused by ordering of the ethylene moieties in BEDT-TTF molecule at T G ϭ75 K. We find that the optimal cooling procedures ͑slow cooling of Ϫ0.2 K/h or annealing for 3 days in the region of T G ) needed to establish the ground state depend critically on the sample origin, indicating different relaxation times of terminal ethylene groups. We show that, in the ground state, the behavior observed for nominally pure single crystals from both syntheses is consistent with unconventional d-wave order parameter. The in-plane penetration depth in (T) is strongly linear, whereas the out-of-plane component out (T) varies as T 2 . In contrast, the behavior of single crystals with long relaxation times observed after slow (Ϫ0.2 K/h) cooling is as expected for a d-wave superconductor with impurities ͓i.e., in (T)ϰ out (T)ϰT 2 ] or might be also reasonably well described by the s-wave model. Our results might reconcile the contradictory findings previously reported by different authors.

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Demagnetizing fields in the de Haas-van Alphen effect

Cited by 43 publications

References 16 publications

Superconducting Ti15Zr15Nb35Ta35 High-Entropy Alloy With Intermediate Electron-Phonon Coupling

Superconducting Ti15Zr15Nb35Ta35 High-Entropy Alloy With Intermediate Electron-Phonon Coupling

Dynamic Nuclear Polarization of [1-13C]pyruvic acid at 4.6 tesla

Influence of internal disorder on the superconducting state in the organic layered superconductorκ−(BEDT−TTF
Pinterić
¹
,
Tomić
²
,
Prester
³

et al. 2002
Phys. Rev. B
42
3
41
1
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Demagnetizing fields in the de Haas-van Alphen effect

Cited by 43 publications

References 16 publications

Superconducting Ti15Zr15Nb35Ta35 High-Entropy Alloy With Intermediate Electron-Phonon Coupling

Superconducting Ti15Zr15Nb35Ta35 High-Entropy Alloy With Intermediate Electron-Phonon Coupling

Dynamic Nuclear Polarization of [1-13C]pyruvic acid at 4.6 tesla

Influence of internal disorder on the superconducting state in the organic layered superconductorκ−(BEDT−TTFPinterić1, Tomić2, Prester3 et al. 2002Phys. Rev. B423411View full textAdd to dashboardCite

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Influence of internal disorder on the superconducting state in the organic layered superconductorκ−(BEDT−TTF
Pinterić
¹
,
Tomić
²
,
Prester
³

et al. 2002
Phys. Rev. B
42
3
41
1
View full text Add to dashboard Cite