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Magnetic Structures of Ho_5Rh_4Ge_{10}

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Szytuła A., Penc B., Hofmann M., Sikora W.
Acta Physica Polonica A
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2013
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vol. 124
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issue 6
1002-1004
EN
A powder diffraction measurement of Ho_5Rh_4Ge_{10} is reported. This compound crystallizes in the tetragonal Sc_5Co_4Si_{10}-type structure (space group P4/mbm) in which the Ho atoms occupy three different sites. The neutron diffraction measurements indicate antiferromagnetic order with the Néel temperature T_{N}=7 K. Below T_{N} an additional phase transition at 4.5 K connected with the change of the magnetic structure is observed. The Ho moments in 4(h) site form collinear order up to T_{N} while moments at 2(a) site form sine modulated structure. Determined experimentally magnetic structures are compared to the results of symmetry analysis.
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Influence of Magnetic Field on Detection Properties of Planar Microwave Diodes

75%
Sužiedėlis A., Ašmontas S., Požela J., Gradauskas J., Nargelienė V., Paškevič Č., Derkach V., Golovashchenko R., Goroshko E., Korzh V., Anbinderis T.
Acta Physica Polonica A
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2011
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vol. 119
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issue 2
218-221
EN
The results of experimental investigation of detection properties of the planar microwave diodes of various configuration on DC magnetic field are presented in this paper. The detection of microwave radiation was measured at 51 GHz, 72 GHz and 144 GHz frequencies. The magnetic field was applied in plane and perpendicularly to the plane of the diodes. The experiment was performed at room temperature. Dependence of the detected voltage of the diodes on the magnetic field had asymmetric character with respect to the polarity of the magnetic field. This fact allowed us to suspect the magnetic rectification influencing the detected voltage. Therefore, average value of the detected voltage with respect to the polarity of the applied magnetic field gives its dependence on the applied magnetic field.
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