| 摘要 |
A sensor comprises a reference sample arranged to be subject to at least one variable physical parameter such that a variation in the value of the at least one variable physical parameter causes a change in the magnetisation of the reference sample, means for measuring the magnetisation of the reference sample, and means for determining in dependence upon the measured magnetisation whether there has been a variation in the value of the at least one variable physical parameter, wherein the reference sample comprises a Heusler alloy. |
