Volume magnetic susceptibility of gold–platinum alloys: possible materials to make mass standards for the watt balance experiment

Autor:	Patrick Pinot, Z Silvestri, Richard Davis, André Gosset, Tanguy Madec, Philippe Richard, G. Geneves
Rok vydání:	2003
Předmět:	Materials science Condensed matter physics Magnetic intensity Alloy General Engineering chemistry.chemical_element engineering.material Magnetic susceptibility Design studies Nuclear magnetic resonance chemistry engineering Platinum Watt balance Realization (systems)
Zdroj:	Metrologia. 40:172-176
ISSN:	1681-7575 0026-1394
DOI:	10.1088/0026-1394/40/4/305
Popis:	In 2000, the Bureau National de Metrologie (BNM, France) decided to develop a new watt balance experiment. Among numerous design studies, the choice of the transfer mass is particularly important. Because of the proximity to a source of high magnetic intensity, this mass must have a magnetic susceptibility as weak as possible. Gold–platinum alloy seems to meet this requirement, as well as additional requirements for density and hardness values, making it a possible candidate for mass standard realization. Five different gold–platinum alloys were studied, their volume magnetic susceptibility ranging from −2.8×10−5 to −2.1×10−5 for two of them and from +1.1×10−5 to +8.8×10−5 for the other three.
Databáze:	OpenAIRE
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