High field magnetization of europium-graphite intercalation compound C6Eu |
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Authors: | H. Suematsu K. Ohmatsu K. Sugiyama T. Sakakibara M. Motokawa M. Date |
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Affiliation: | Institute of Materials Science, University of Tsukuba, Sakura-mura, Ibaraki 305, Japan;Department of Physics, Faculty of Science, Osaka University, Toyonaka, Osaka 560, Japan. |
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Abstract: | The whole magnetization curve of the first stage compound C6Eu has been measured by using pulsed fields up to 400 kG below 40 K. For H ⊥ c, c being the crystal c-axis, four regions are observed in the magnetization curve; I) the initial magnetization region with an apparent moment of ~ 0.6microB per Eu ion (H < 12 kG), II) the intermediate region with nearly constant moment of 2.2 – 2.7 microB, which corresponds to the full moment of Eu2+ ion (22 < H < 82 kG), III) the region of a linear field dependence (82 < H < 205 kG), and IV) the saturation region above 205 kG, where the saturation moment is found as 6.2 microB. For H//c, the magnetization increases monotonically and approaches to a saturation value corresponding to 6 microB above 240 kG. |
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