| 摘要 |
<p>Provided is aΔE measuring device minimizing external magnetic disturbance, more particularly, aΔE measuring device measuring a change (ΔE) in elastic modulus under a magnetic field by removing a bias effect by the earth's magnetic field and a magnetic tool and device and using a magneto acoustic resonance method. With theΔE measuring device, a space minimizing external magnetic disturbance using three-axis Helmholtz coils is provided and theΔE measuring device having a plurality of coil structures is inserted into the space, thereby making it possible to minimize external magnetic field disturbance.</p> |
