Magnetization and transport properties of single crystalline RPd${_2}$P${_2}$ (R=Y, La-Nd, Sm-Ho, Yb)

Gil Drachuck; Anna E. Böhmer; Sergey L. Bud'ko; Paul C. Canfield

doi:10.1016/j.jmmm.2016.05.089

paper

Magnetization and transport properties of single crystalline RPd $_{2}$ P $_{2}$ (R=Y, La-Nd, Sm-Ho, Yb)

arXiv:1601.03025 · doi:10.1016/j.jmmm.2016.05.089

Abstract

Single crystals of RPd $_{2}$ P $_{2}$ (R=Y, La-Nd, Sm-Ho, Yb) were grown out of a high temperature solution rich in Pd and P and characterized by room-temperature powder X-ray diffraction, anisotropic temperature- and field-dependent magnetization and temperature-dependent in-plane resistivity measurements. In this series, YPd $_{2}$ P $_{2}$ and LaPd $_{2}$ P $_{2}$ and YbPd $_{2}$ P $_{2}$ (with Yb $^{+ 2}$ ) are non local-moment bearing, whereas CePd $_{2}$ P $_{2}$ and PrPd $_{2}$ P $_{2}$ order at low temperature with a ferromagnetic component along the crystallographic c-axis. The rest of the series manifest low temperature antiferromagnetic ordering. EuPd $_{2}$ P $_{2}$ has Eu $^{+ 2}$ ions and both EuPd $_{2}$ P $_{2}$ and GdPd $_{2}$ P $_{2}$ have isotropic paramagnetic susceptibilities consistent with $L = 0$ and $J = S = \frac{7}{2}$ and exhibit multiple magnetic transitions. For R=Eu-Dy, there are multiple, $T > 1.8$ K transitions in zero applied magnetic field and for R=Nd, Eu, Gd, Tb, and Dy there are clear metamagnetic transitions at T=2.0 K for $H < 55$ kOe. Strong anisotropies arising mostly from crystal electric field (CEF) effects were observed for most magnetic rare earths with $L \neq = 0$ . The experimentally estimated CEF parameters B $_{0}^{2}$ were calculated from the anisotropic paramagnetic $θ_{ab}$ and $θ_{c}$ values and compared to theoretical trends across the rare earth series. The ordering temperatures as well as the polycrystalline averaged paramagnetic Curie-Weiss temperature, $θ_{a v e}$ , were extracted from magnetization and resistivity measurements, and compared to the de-Gennes factor.

17 pages, 16 figures

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Magnetization and transport properties of single crystalline RPd $_{2}$ P $_{2}$ (R=Y, La-Nd, Sm-Ho, Yb)