Neutron depolarization imaging of the hydrostatic pressure dependence of inhomogeneous ferromagnets

作者：Schulz M^*; Neubauer A; Boeni P; Pfleiderer C

来源：Applied Physics Letters, 2016, 108(20): 202402.

DOI：10.1063/1.4950806

The investigation of fragile and potentially inhomogeneous forms of ferromagnetic order under extreme conditions, such as low temperatures and high pressures, is of central interest for areas such as geophysics, correlated electron systems, as well as the optimization of materials synthesis for applications where particular material properties are required. We report neutron depolarization imaging measurements on the weak ferromagnet Ni3Al under pressures up to 10 kbar using a Cu:Be clamp cell. Using a polychromatic neutron beam with wavelengths lambda >= 4 angstrom in combination with 3 He neutron spin filter cells as polarizer and analyzer, we were able to track differences of the pressure response in inhomogeneous samples by virtue of high resolution neutron depolarization imaging. This provides spatially resolved and non-destructive access to the pressure dependence of the magnetic properties of inhomogeneous ferromagnetic materials. Published by AIP Publishing.

• 出版日期2016-5-16