Magnetometer for large magnetic moments with strong magnetic anisotropy

A system configured for determining a magnetic moment associated with a sample of a superconductor material, comprising:

• a magnetometer, comprising:
• an actuator driven by a motor;
• a load cell coupled to the actuator;
• a rotatable spool having a platform configured to hold a sample of a superconductor material, wherein the rotatable spool is coupled to the load cell by a first line;
• a pulley;
• and
• a second line extending between the rotatable spool and a counterweight, wherein the second line is positioned on the pulley,
• wherein movement of the actuator causes the rotatable spool to rotate an angle of the platform relative to a magnetic field about the rotatable spool,
• and wherein the load cell is configured to measure a tension on the first line.

A method comprising:

• providing a temperature to a rotatable spool of a magnetometer having a platform configured to hold a sample of a superconductor material, wherein the platform is disposed at a first angle;
• applying a magnetic field to the rotatable spool;
• measuring, via a pickup coil of the magnetometer, the first angle of the platform;
• measuring a first tension associated with a first line of the magnetometer, wherein the first line is coupled to a load cell of the magnetometer and the rotatable spool;
• determining a first magnetic moment associated with the sample of the superconductor material based at least in part on the first tension, the first angle, and the temperature;
• and
• determining a first critical current associated with the sample of the superconductor material based at least in part on the first magnetic moment.