Effects of chemical doping and pressure on CaFe(4)As(3)
| Title | Effects of chemical doping and pressure on CaFe(4)As(3) |
| Publication Type | Journal Article |
| Year of Publication | 2011 |
| Authors | Zhao LL, Kim SK, McCandless GT, Torikachvili MS, Canfield PC, Chan JY, Morosan E |
| Journal Title | Physical Review B |
| Volume | 84 |
| Pages | 104444 |
| Date Published | 09 |
| ISBN Number | 1098-0121 |
| Accession Number | WOS:000295325700003 |
| Abstract | The effects of chemical doping by P, Yb, Co, and Cu, and hydrostatic pressure on CaFe(4)As(3), were studied on single-crystalline samples. While the former two dopants substitute the nonmagnetic ions, the latter two partially occupy the Fe sites within the magnetic sublattice. The incommensurate spin density wave (IC-SDW) ordering at T(N) similar to 88 K in CaFe(4)As(3) changes only by up to similar to 40% with doping and applied pressure. Thus the IC-SDW state appears more robust than in the layered Fe pnictides. The commensurate SDW (C-SDW) state below T(2) similar to 26 K is suppressed in the Co-doped series, while it moves up in temperature in the P-, Yb-, and Cu-doped compounds. A new magnetic phase transition is observed at an intermediate temperature T(3) in Ca(Fe(1-x)Co(x))(4)As(3). Resistivity and magnetization measurements on CaFe(4)As(3) were performed under hydrostatic pressure up to 5 GPa, showing a systematic decrease of T(N) and a domelike phase boundary at T(2) up to p(c) similar to 2.10 GPa. At higher pressures, a possible structural phase transition occurs, marked by a slowly increasing transition temperature. A phase diagram is shown to compare the effects of chemical doping and pressure. |
| DOI | 10.1103/PhysRevB.84.104444 |
