Matches in SemOpenAlex for { <https://semopenalex.org/work/W2038392976> ?p ?o ?g. }
- W2038392976 abstract "Using ac susceptibility, we determine the critical current density ${J}_{c}$ and the flux creep activation energy U of an a-axis-oriented ${mathrm{HgBa}}_{2}{mathrm{CaCu}}_{2}{mathrm{O}}_{6+ensuremath{delta}}$ thin film. The critical current density at helium temperatures is found to be $4.6ifmmodetimeselsetexttimesfi{}{10}^{4}{mathrm{A}/mathrm{c}mathrm{m}}^{2},$ i.e., about two orders of magnitude smaller than for corresponding films with c-axis orientation. The temperature and ac field dependent activation energy is consistent with dislocation-mediated flux creep and well described by ${U(T,H}_{mathrm{ac}}{)=U}_{0}(1ensuremath{-}{t}^{4}{)H}_{mathrm{ac}}^{ensuremath{-}1/2}$ with ${t=T/T}_{c},$ ${T}_{c}=120mathrm{K},$ and ${U}_{0}=0.77{mathrm{eV}mathrm{}mathrm{Oe}}^{1/2}$ for temperatures $T>45mathrm{K}$ and in the field range studied. The activation energy is of the same order as that found in c-axis-oriented films. Below $T=45mathrm{K}$ the activation energy is observed to decrease as thermally assisted quantum creep becomes increasingly important." @default.
- W2038392976 created "2016-06-24" @default.
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- W2038392976 date "2001-06-22" @default.
- W2038392976 modified "2023-10-02" @default.
- W2038392976 title "Dislocation-mediated creep of highly separated vortices in<i>a</i>-axis-oriented<mml:math xmlns:mml=http://www.w3.org/1998/Math/MathML display=inline><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>HgBa</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal>CaCu</mml:mi></mml:mrow><mml:mrow><mml:mn>2</mml:mn></mml:mrow></mml:msub></mml:mrow><mml:mrow><mml:msub><mml:mrow><mml:mi mathvariant=normal…" @default.
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- W2038392976 doi "https://doi.org/10.1103/physrevb.64.024526" @default.
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