MAGNETIC MEASUREMENTS ONYC2ENCAPSULATED IN GRAPHITIC POLYHEDRAL PARTICLES

A. Kasuya, H. Iwasaki, Y. Saito, M. Okuda, Harutaka Takahashi, M. Suezawa, K. Sumiyama, K. Suzuki and Y. Nishina
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A. Kasuya: Institute for Materials Research, Tohoku University, Sendai, Japan
H. Iwasaki: School of Materials Science, Japan Advanced Institute of Science and Technology, Hokuriku, Tatsunokuchi, Ishikawa, Japan
Y. Saito: Department of Electrical and Electronic Engineering, Mie University, Mie, Japan
M. Okuda: Department of Electrical and Electronic Engineering, Mie University, Mie, Japan
M. Suezawa: Institute for Materials Research, Tohoku University, Sendai, Japan
K. Sumiyama: Institute for Materials Research, Tohoku University, Sendai, Japan
K. Suzuki: Institute for Materials Research, Tohoku University, Sendai, Japan
Y. Nishina: Institute for Materials Research, Tohoku University, Sendai, Japan

Surface Review and Letters (SRL), 1996, vol. 03, issue 01, 853-855

Abstract: Graphitic polyhedrons encagingYC2of 30–70 nm in diameter have been synthesized by an arc-discharge method. Our measurements identify thatYC2crystallizes in a body-centered tetragonal and becomes type-II superconductor below 3.9 K. The transition temperature shows very small size dependence, and is nearly equal to previous measurements on bulkYC2in vacuum. AlthoughYC2is hygroscopic, our samples yield reliable and reproducible experimental results in our electron microscope, x-ray diffraction, paramagnetic resonance, and magnetization measurements in air under magnetic field up to 3000 Oe and temperatures down to 1.7 K.

Date: 1996
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DOI: 10.1142/S0218625X96001534

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