Magnetic measurements on micrometer-sized samples under high pressure using designed NV centers

We report a method for spatially resolved optical magnetometry based on imaging a layer of nitrogen-vacancy (NV) centers created at the surface of a diamond anvil. We illustrate the method using two sets of measurements realized at room temperature and low temperature, respectively: the pressure evolution of the magnetization of an iron bead up to 30 gigapascals showing the iron ferromagnetic collapse and the detection of the superconducting transition of magnesium dibromide at 7 gigapascals.

Source: ScienceNOW - December 11, 2019 Category: Science Authors: Lesik, M., Plisson, T., Toraille, L., Renaud, J., Occelli, F., Schmidt, M., Salord, O., Delobbe, A., Debuisschert, T., Rondin, L., Loubeyre, P., Roch, J.-F. Tags: Physics reports Source Type: news