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Measurements of the susceptibility of Bi 2 Te 3 over the temperature range 100°K to 600°K, with magnetic field parallel (χ parallel ) and perpendicular (χ perpendicular ) to the c axis, are reported. Bi 2 Te 3 is diamagnetic and χ parallel has the larger algebraic value. The contributions to the susceptibility from the core and valence electrons, free carriers and impurities are discussed, and it is suggested that the effect of the impurities is negligible, the free carriers give rise to a paramagnetic contribution and the main contribution is from the core and valence electrons.
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