Acquisition of a SQUID Magnetometer for the Characterization of Nanostructured Magnetic and Superconducting Materials

9422192 Childress部分支持佛罗里达大学获得SQUID磁强计，用于表征薄膜和纳米结构磁性和超导材料。该设备将具有在+ 5特斯拉的应用磁场范围内检测来自超小型磁性结构的磁信号所需的灵敏度。此外，它还将具备进行交流磁化率测量的能力，这对超导相的精确非接触表征至关重要，对纳米结构磁性材料中的弛豫现象的研究也很有用。最后，它将能够在非常低的磁场下精确地工作，从而可以准确地表征磁性软薄层（对磁阻传感器应用有用）。这所大学目前还没有这种仪器。物理系的旧仪器一直在使用，不包括交流测量或超低场能力。拟议的仪器将由总共6名教员和20名研究生/本科生使用。

Abstract 9422192 Childress Partial support is provided to the University of Florida to acquire a SQUID magnetometer for the characterization of thin-film and nanostructured magnetic and superconducting materials. The equipment will have the sensitivity required to detect magnetic signal from ultra-small magnetic structure in an applied magnetic field range of + 5 Tesla. In addition, it will be equipped with the ability to perform AC susceptibility measurements, which are critical to the accurate non-contact characterization of superconducting phases, and useful for the study of relaxation phenomena in nanostructured magnetic materials. Finally, it will be able to perform accurately at very low fields, so that magnetically soft thin layers (useful for magneto-resistive sensor applications) may be accurately characterized. An instrument of this kind is not currently available at the University. An older instrument in the Physics Department is being used continuously and does not include AC measurement or ultra-low fields capabilities. The proposed instrument will be used by a total of six faculty members and 20 graduate/undergraduate students.