Measuring the Penetration Depth Anisotropy in MgB$_2$ using Small-Angle Neutron Scattering

D. Pal; L. DeBeer-Schmitt; T. Bera; R. Cubitt; C. D. Dewhurst; J. Jun; N. D. Zhigadlo; J. Karpinski; V. G. Kogan; M. R. Eskildsen

doi:10.1103/PhysRevB.73.012513

Measuring the Penetration Depth Anisotropy in MgB$_2$ using Small-Angle Neutron Scattering

Superconductivity 2009-11-11 v3

Authors: D. Pal , L. DeBeer-Schmitt , T. Bera , R. Cubitt , C. D. Dewhurst , J. Jun , N. D. Zhigadlo , J. Karpinski , V. G. Kogan , M. R. Eskildsen

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Abstract

Using small-angle neutron scattering we have measured the misalignment between an applied field of 4 kOe and the flux-line lattice in MgB $_2$ , as the field is rotated away from the c axis by an angle $\theta$ . The measurements, performed at 4.9 K, showed the vortices canting towards the c axis for all field orientations. Using a two-band/two-gap model to calculate the magnetization we are able to fit our results yielding a penetration depth anisotropy, $\glam = 1.1 \pm 0.1$ .

Keywords

magnetic anisotropy magnetometer

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@article{arxiv.cond-mat/0511376,
  title  = {Measuring the Penetration Depth Anisotropy in MgB$_2$ using Small-Angle Neutron Scattering},
  author = {D. Pal and L. DeBeer-Schmitt and T. Bera and R. Cubitt and C. D. Dewhurst and J. Jun and N. D. Zhigadlo and J. Karpinski and V. G. Kogan and M. R. Eskildsen},
  journal= {arXiv preprint arXiv:cond-mat/0511376},
  year   = {2009}
}

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Measuring the Penetration Depth Anisotropy in MgB$_2$ using Small-Angle Neutron Scattering

Abstract

Keywords

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