1.引言由于人们对“稀磁性”合金低温电磁特性的深入研究,导致一些在低温下很有实用价值的测温材料的发现,其中AuFe、RhFe、PtCo等合金已成功地用于极低温域的精密测温。尽管PtCo稀合金20K以下的灵敏度(dR/dT)比RhFe合金稍小,但是由于PtCo00.5合金比RhFe0.5合金在低温下有更高的电阻率、易于加工、资源富有、容易获得高 1. Introduction As a result of extensive research on the low-temperature electromagnetic properties of “dilute-magnetic” alloys, some of them have found practical applications at low temperatures. AuFe, RhFe and PtCo alloys have been successfully used in extremely low temperature Precision temperature measurement. Although PtCo rare-earth alloys have a lower sensitivity (dR / dT) below 20K than RhFe alloys, PtCo00.5 alloys have higher resistivity at lower temperatures than RhFe0.5 alloys, are easy to process, are rich in resources and are easy to obtain high