Effect of molybdenum 4d hole substitution in BaFe(2)As(2)
| Title | Effect of molybdenum 4d hole substitution in BaFe(2)As(2) |
| Publication Type | Journal Article |
| Year of Publication | 2012 |
| Authors | Sefat AS, Marty K, Christianson AD, Saparov B, McGuire MA, Lumsden MD, Tian W, Sales BC |
| Journal Title | Physical Review B |
| Volume | 85 |
| Pages | 024503 |
| Date Published | 01 |
| Type of Article | Article |
| ISBN Number | 1098-0121 |
| Accession Number | WOS:000298862700005 |
| Abstract | We investigate the thermodynamic and transport properties of molybdenum-doped BaFe(2)As(2) (122) crystals, the first report of hole doping using a 4d element. The chemical substitution of Mo in place of Fe is possible up to similar to 7%. For Ba(Fe(1-x)Mo(x))(2)As(2), the suppression rate of the magnetic transition temperature with x is the same as in 3d Cr-doped 122 and is independent of the unit cell changes. This illustrates that the temperature-composition phase diagram for hole-doped 122 can be simply parameterized by x, similar to the electron-doped 122 systems found in the literature. Compared to 122 with a coupled antiferromagnetic order (T(N)) and orthorhombic structural transition (T(0)) at approximate to 132 K, 1.3% Mo-doped 122 (x = 0.013) gives T(N) = T(0) = 125(1) K according to neutron diffraction results and features in specific heat, magnetic susceptibility, and electrical resistivity. The cell volume expands by similar to 1% with maximum Mo doping and T(N) is reduced to approximate to 90 K. There is a T* feature that is identified for lightly Cr- or Mo-doped 122 crystals, which is x dependent. This low-temperature transition may be a trace of superconductivity. |
| URL | <Go to ISI>://WOS:000298862700005 |
| DOI | 10.1103/PhysRevB.85.024503 |
| Alternate Journal | Phys. Rev. B |
