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Is the Magnetism of HgSe:Fe Clearly Understood?

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Dybko K., Łusakowski A., Kossut J., Arciszewska M., Linden P. J. E. M. v., Wittlin A., Perenboom J. A. A. J., Mycielski A.

Acta Physica Polonica A

1995

vol. 87

issue 1

193-196

The high magnetic field magnetization measurements of low composition Hg_{1-x}Fe_{x}Se (0.0002 < x < 0.003) at temperatures ranging from 1.6 K to 40 K and in magnetic fields up to 20 T are reported. The magnetization in a sample containing only Fe^{3+} ions (x = 0.0002) is described by the Brillouin function (j = 5/2). The magnetization in the sample codoped with Ga, containing only Fe^{2+} is well described in the model of isolated Fe^{2+} ions. The latter model takes into account the tetrahedral crystal field, the spin-orbit interaction and the Zeeman term. On the other hand, the magnetization of sample with both Fe^{3+} and Fe^{2+} present simultaneously (x = 0.003) is shown to be different from a simple additive superposition of the contributions due to Fe^{3+} and Fe^{2+} subsystems. The possible origin of this discrepancy is discussed.

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1 Acta Physica Polonica A

1 1995

1 Arciszewska M.

1 Dybko K.

1 Kossut J.

1 Linden P. J. E. M. v.

1 Mycielski A.

1 Perenboom J. A. A. J.

1 Wittlin A.

1 Łusakowski A.

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Is the Magnetism of HgSe:Fe Clearly Understood?