Image of the BH Looper

Model MESA (Shb Instruments)

 

The B-H Looper measures the hysteresis loop (Flux, Φ versus Field strength, H) of a magnetic material. The pickup coils on this instrument are configured to measure thin-film samples. A four-point probe option (available) allows measurement of sheet resistance for characterization of magnetoresistance. A separate fixture allows samples to be bent during measurement to determine magnetostrictive properties.

Manufacturer's Website

Capabilities:

  • Measure magnetic hysteresis loops with
    • Field strength up to 100 mT in sample plane
    • Low frequency sine excitation (1 to 10 Hz)
    • 0.01 to 10000 nWb/division vertical sensitivity range
    • Measured quantities: Remanent flux density, Br, saturation flux density, Bs, coercivity, Hc
  • Magnetoresistance measurement using four-point probe
  • (inverse) Magnetostriction measurement
    • In-situ bending fixture applies up to 13 N force on wafer
  • Accommodates wafers up to 6" in diameter

Example Data:

BH Looper Sample Data