Field Dependence of Magnetoresistance in No-binder Soft Carbons at 77゜K

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概要

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• The dependence of magnetoresistance on magnetic field is investigated at 77゜K for soft carbons prepared from Texas petroleum coke (no-binder) by heat treatments in the range 1400゜-3000℃. For specimens heat treated at temperatures between 1400゜ and 2200℃, the magnetoresistance is negative; its absolute value increases monotonically with increasing heat treatment temperature (HTT) and with increasing magnetic field. For specimens heat treated between 2400゜ and 2450℃, the magnetoresistance is negative and tends to saturate at higher fields. The absolute value becomes larger for lower HTT. Specimens heat treated between 2400゜ and 2450℃ show a magnetoresistance which is negative at low fields, passes through minimum and becomes greater for lower HTT. For specimens with HTT≧2570℃, no negative magnetoresistance is observed even at low fields. Some discussion of the effects found is included.

• 社団法人応用物理学会の論文
• 1971-04-05

著者

• HISHIYAMA Yoshihiro

  Musashi Institute of Technology

• ONO Akio

  Musashi Institute of Technology

• HASHIMOTO Masaaki

  Musashi Institute of Technology

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