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arXiv · 0908.4011

Magnetic properties of PrPd$_{2}$Si$_{2}$ and PrPt$_{2}$Si$_{2}$

V. K. Anand·Z. Hossain·C. Geibel
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Abstract

We have investigated the two rare-earth intermetallic compounds PrPd$_{2}$Si$_{2}$ and PrPt$_{2}$Si$_{2}$ by means of magnetization, electrical resistivity and heat capacity measurements. While PrPd$_{2}$Si$_{2}$ exhibits an antiferromagnetic ordering at 3 K, no magnetic ordering is observed in PrPt$_{2}$Si$_{2}$ down to 2 K. The different magnetic behaviors of these two compounnds are due to different crystalline electric field (CEF) level schemes. The specific heat data suggest a quasi-quartet ground state in PrPd$_2$Si$_2$ in contrast to a nonmagnetic singlet ground state in PrPt$_2$Si$_2$. This difference is attributed to the loss of a mirror plane upon changing the crystal structure from the ThCr$_2$Si$_2$ type (PrPd$_2$Si$_2$) to the CaBe$_2$Ge$_2$ type (PrPt$_2$Si$_2$). Further on, a large magnetoresistance is also observed in the magnetically ordered state of PrPd$_2$Si$_2$.

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V. K. Anand, Z. Hossain, C. Geibel. 2009-08-27. Magnetic properties of PrPd$_{2}$Si$_{2}$ and PrPt$_{2}$Si$_{2}$. https://arxiv.org/abs/0908.4011

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