Systems and methods for measuring magnetic fields from solvated target molecules using a magnetoresistive sensor

A method, comprising:

• solvating target molecules and placing the solvated target molecules in a container;
• providing the container with the solvated target molecules in a measurement system comprising a plurality of magnetoresistive (MR) sensor devices, each of the MR sensor devices comprising at least one MR sensor disposed near the container and configured to measure a magnetic field generated by the solvated target molecules, each of the at least one MR sensor comprising a pin layer having a pinned direction of magnetization, a free layer having a direction of magnetization that varies with an applied magnetic field, and a non-conductive layer separating the pin layer and the free layer, wherein the MR sensor devices are arranged along at least three orthogonal directions with respect to the container;
• using the at least one MR sensor of at least three of the MR sensor devices to acquire a magnetic field generated by the solvated target molecules;
• and producing signals by the at least one MR sensor of each of the at least three MR sensor devices in response to the acquired magnetic field.