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A new method for magnetic susceptibility measurements and the temperature dependence of the magnetic susceptibility of copper acetate and oxides

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Abstract

A new method of measurement of the magnetic susceptibility of substances in a broad range of temperatures is described, which is based on the compensation (nulling) of an external magnetic field and a non-mechanical detection of the secondary magnetic field of a sample using Hall sensors. It is shown that, in copper acetate monohydrate, the Bleaney-Bowers model is valid and the antiferromagnetic exchange interactions are retained at elevated temperatures. The temperature variation of the magnetic susceptibility of copper oxides (CuO, Cu2O) measured in a range from 25 to 900°C reveals a nonlinear increase in the diamagnetic response and is accompanied by a characteristic IR luminescence, which is suggested to be of an exciton nature.

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Authors and Affiliations

  1. Herzen State Pedagogical University, St. Petersburg, 191186, Russia

    V. B. Kopylov & E. V. Sergeev

Authors
  1. V. B. Kopylov
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  2. E. V. Sergeev
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Correspondence to V. B. Kopylov.

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Original Russian Text © V.B. Kopylov, E.V. Sergeev, 2007, published in Pis’ma v Zhurnal Tekhnicheskoĭ Fiziki, 2007, Vol. 33, No. 15, pp. 87–94.

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Kopylov, V.B., Sergeev, E.V. A new method for magnetic susceptibility measurements and the temperature dependence of the magnetic susceptibility of copper acetate and oxides. Tech. Phys. Lett. 33, 670–673 (2007). https://doi.org/10.1134/S1063785007080147

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  • DOI: https://doi.org/10.1134/S1063785007080147

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