caa a22 4500 445365870 CHVBK 20180317142930.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s10909-010-0328-7 doi (NATIONALLICENCE)springer-10.1007/s10909-010-0328-7 Morishita M. Graduate School of Pure and Applied Sciences, University of Tsukuba, 305-8751, Tsukuba, Japan aut Surface Observation and Magnetization Measurements of Grafoil Substrate [Elektronische Daten] [M. Morishita] The important roles of impurity grains in graphite substrate in heat transfer mechanisms between 3He films and graphite substrate have been suggested. At sub-milli-Kelvin temperature ranges in particular, magnetic impurity grains of large diameter, about several micrometers are believed to play an important role in the heat transfer mechanism. However, the existence of such large grains is still controversial. Freshly cleaved surfaces of Grafoil are observed by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS) analyses. Although results are preliminary, impurity grains with diameters of 0.5∼10μm containing Al, Ca, Si, Fe, etc., are observed. Ferromagnetism is also observed after the subtraction of the diamagnetic contribution in magnetization measurements of Grafoil. The saturation magnetization coincides with the amount of magnetic impurities determined by ash analysis. Springer Science+Business Media, LLC, 2010 Graphite nationallicence Grafoil nationallicence Scanning electron microscopy nationallicence Energy dispersive X-ray spectroscopy nationallicence Magnetization nationallicence Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 638-644 0022-2291 162:5-6<638 2011 162 10909 https://doi.org/10.1007/s10909-010-0328-7 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10909-010-0328-7 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Morishita M. Graduate School of Pure and Applied Sciences, University of Tsukuba, 305-8751, Tsukuba, Japan aut NATIONALLICENCE 773 0- Journal of Low Temperature Physics Springer US; http://www.springer-ny.com 162/5-6(2011-03-01), 638-644 0022-2291 162:5-6<638 2011 162 10909 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer