Patent ID: 7944205

Claim:
A system for measuring a magnetic resonance signal in a sample placed in an external magnetic field, including an excitation device for applying high-intensity radio-frequency pulses at a predetermined emission frequency f e in a measurement zone containing the sample, the excitation device including an excitation coil tuned to said predetermined emission frequency f e and disposed in the vicinity of the sample to emit an electromagnetic field essentially perpendicular to the static external magnetic field, the system being characterized in that it further includes at least a one superconductive-magnetoresistive hybrid sensor including a superconductive loop having a constriction adapted to increase significantly the current density and at least a magnetoresistive sensor placed in the immediate vicinity of said constriction, separated therefrom by an insulative deposit, said magnetoresistive sensor and said constriction being covered with a layer of non-superconductive metal to serve as a heat sink and to provide protection against destruction by radio-frequency pulses.