| Title | Crystal and magnetic structure of CaCo1.86As2 studied by x-ray and neutron diffraction |
| Publication Type | Journal Article |
| Year of Publication | 2013 |
| Authors | Quirinale, DG, Anand, VK, Kim, MG, Pandey, A, Huq, A, Stephens, PW, Heitmann, TW, Kreyssig, A, McQueeney, RJ, Johnston, DC, Goldman, AI |
| Journal | Physical Review B |
| Volume | 88 |
| Pagination | 174420 |
| Date Published | 11 |
| Type of Article | Article |
| ISBN Number | 1098-0121 |
| Accession Number | WOS:000327314700005 |
| Keywords | high-temperature superconductivity, laco2p2, order, phase-transitions, phosphides caco2p2, pressure, structure, ternary arsenides, thcr2si2 |
| Abstract | Neutron and x-ray diffraction measurements are presented for powders and single crystals of CaCo2As2. The crystal structure is a collapsed-tetragonal ThCr2Si2-type structure as previously reported, but with 7(1)% vacancies on the Co sites corresponding to the composition CaCo1.86(2)As2. The thermal expansion coefficients for both the a and c axes are positive from 10 to 300 K. Neutron diffraction measurements on single crystals demonstrate the onset of A-type collinear antiferromagnetic order below the Neel temperature T-N = 52(1) K with the ordered moments directed along the tetragonal c axis, aligned ferromagnetically in the ab plane and antiferromagnetically stacked along the c axis. |
| DOI | 10.1103/PhysRevB.88.174420 |
| Custom 1 | Correlations |
