Field dependence of the superconducting basal plane anisotropy of TmNi2B2C
| Title | Field dependence of the superconducting basal plane anisotropy of TmNi2B2C |
| Publication Type | Journal Article |
| Year of Publication | 2012 |
| Authors | Das P, Densmore JM, Rastovski C, Schlesinger KJ, Laver M, Dewhurst CD, Littrell K, Bud'ko SL, Canfield PC, Eskildsen MR |
| Journal Title | Physical Review B |
| Volume | 86 |
| Pages | 144501 |
| Date Published | 10 |
| Type of Article | Article |
| ISBN Number | 1098-0121 |
| Accession Number | WOS:000309345400006 |
| Keywords | core, LATTICE, magnetic-structure, single-crystal tmni2b2c, vortices |
| Abstract | The superconductor TmNi2B2C possesses a significant fourfold basal plane anisotropy, leading to a square vortex lattice (VL) at intermediate fields. However, unlike other members of the borocarbide superconductors, the anisotropy in TmNi2B2C appears to decrease with increasing field, evident by a reentrance of the square VL phase. We have used small-angle neutron scattering measurements of the VL to study the field dependence of the anisotropy. Our results provide a direct, quantitative measurement of the decreasing anisotropy. We attribute this reduction of the basal plane anisotropy to the strong Pauli paramagnetic effects observed in TmNi2B2C and the resulting expansion of vortex cores near H-c2. |
| URL | <Go to ISI>://WOS:000309345400006 |
| DOI | 10.1103/PhysRevB.86.144501 |
| Alternate Journal | Phys. Rev. B |
