Evolution of magnetic structure in MnP as pressure tunes it towards superconductivity
Manganese phosphide MnP has been investigated for decades because of its rich magnetic phase diagram. The magnetic structure of MnP is ferromagnetic below 291K. It transforms into a helimagnetic structure at 47K with a propagation vector q = 0.117a*. Very recently Superconductivity was reported under pressures of 8 GPa. Since this finding might make MnP the first Mn-based superconductor, and superconductivity occur in the vicinity of FM, AFM and helical phases, there is a need to understand how the magnetism evolve upon doping as the system approaches the superconducting state. Our objective is to complete the phase diagram of magnetic structure with temperature and pressure by neutron diffraction experiments. Combining powder and single crystal diffraction we aim to: 1) Identify the magnetic phases up to 8GPa, 2) track pressure dependence of ordered moment and ordering vector, 3) refine the detailed magnetic structure in each of the identified phases.
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Shin-ichiro Yano; CHATTOPADHYAY Sumanta; Thomas C. Hansen; LANCON Diane; RESSOUCHE Eric and Henrik M. Ronnow. (2015). Evolution of magnetic structure in MnP as pressure tunes it towards superconductivity. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.5-31-2452
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