Magnetic Measurements of Single Crystals of Titanomagnetites

PI将测量磁致伸缩的热依赖性 和磁晶各向异性常数高于室温 在钛磁铁矿的合成单晶中。 单晶 将通过浮区技术从熔体中生长， 劳伦斯晶体生长设备上的电弧成像炉 利弗莫尔国家实验室。 单晶工作将 磁致伸缩的热依赖性的补充工作， 多晶样品。 没有这样的测量， 磁晶各向异性的热依赖性高于室温， 富钛钛磁铁矿的温度。 热 这些基本常数的相互依赖性对理论很重要 热释磁磁化率和热依赖性 域国家。

The PI will measure the thermal dependence of magnetostriction and magnetocrystalline anistrophy constants above room-temperature in synthetic single crystals of titanomagnetites. Single crystals will be grown from the melt by the floating zone technique in an arc image furnace at the crystal growth facility at Lawrence Livermore National Laboratory. The single crystal work will complement work on the thermal dependence of magnetostriction in polycrystalline Samples. There are no such measurements for the thermal dependence of magnetocrystalline anisotropy above room- temperature for titanium-rich titanomagnetites. The thermal dependence of these fundamental constants is important for theories of thermoremanent magnetization, coercivity, and thermal dependence of domain states.