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Magnetic Properties of a Novel CeCo_{0.715}Si_{2.285} Compound

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Moudřík J., Prokleška J., Pospíšil J., Sechovský V., Císařová I.

Acta Physica Polonica A

2015

vol. 127

issue 2

561-563

We report on the basic physical properties of a novel CeCo_{0.715}Si_{2.285} compound, mainly its rich magnetic phase diagram. The compound crystallizes in the I-4m2 space group structure with extremely elongated unit cell (a = 4.12 Å, c = 32.84 Å). In a zero magnetic field it orders antiferromagnetically at T_{N} = 10.5 K with another order-to-order transition at 9.5 K. Under application of a magnetic field along the c-axis it manifests numerous magnetic transitions in small fields (B < 500 mT), resembling the so-called "devil's staircase" systems. Above 1 T the magnetization is almost constant up to 14 T (maximum magnetic field applied within our study) but considerably reduced (0.3 μ_B/Ce) with respect to the free Ce^{3+} ion. After removing the applied field, however, the high field state remains unchanged to be removed in negative fields. The compound also exhibits strong hysteresis of magnetization with respect to varying temperature or magnetic field. For fields applied along the a-axis typical behavior for the hard axis in the material with uniaxial anisotropy is observed.

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1 Acta Physica Polonica A

1 2015

1 Císařová I.

1 Moudřík J.

1 Pospíšil J.

1 Prokleška J.

1 Sechovský V.

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Magnetic Properties of a Novel CeCo_{0.715}Si_{2.285} Compound