Sample Dependence of Magnetic Properties and Determination of Antiferromagnetic Structure of NdPd2Al3

Crystal-Field Interactions in RPd_2Al_3 Intermetallics (R = Pr, Nd, Sm, and U)

“…With the intersublattice molecular-eld coecient λ RR = 2.0T /µ B we have reproduced, by calculating the free energy, the relevant Néel temperature of 7.5 K (like in the experiment), but the ordered moment, being perpendicular to the c-axis like in the experiment, amounts at 0 K to 2.78 µ B . This value is much larger than the experimental value of 2.28 µ B [11] the deviation increases with the lowering temperature. One should remember that in our calculations we take energy levels as extremely thin energy lines which is rather unphysical in the energy scale below 0.2 meV.…”

“…Calculated temperature dependence of the heat capacity of NdPd2Al3 associated with the ne electronic structure of the Nd 3+ ion. Experimental data after Ref [11]…”

YPd2Al3—A new superconducting compound

“…PrPd 2 Al 3 remain paramagnetic down to 1.5 K [12]. NdPd 2 Al 3 undergoes an antiferromagnetic transition around 6.5 K [11].…”

“…The non-f-electron compound LaPd 2 Al 3 displays a superconducting transition (SC) at temperature 0.8 K [8]. CePd 2 Al 3 exhibits heavyfermion behavior ( = 380 mJ K −2 mol −1 ) with a strong Kondo effect [9][10][11]. PrPd 2 Al 3 remain paramagnetic down to 1.5 K [12].…”

ScPd 2 Al 3 – New polymorphic phase in Al-Pd-Sc system

“…PrPd2Al3 remains paramagnetic down to 1.5 K due to the crystal field effect 4,5) . NdPd2Al3 becomes antiferromagnetic at TN = 6.5 K but TN varies in the off-stoichiometric samples 6) . The most intriguing cases are the frustrated triangular lattice antiferromagnets GdPd2Al3 and SmPd2Al3 [7][8][9] , and superconductors (SC) LaPd2Al3 (TSC = 0.85 K) 10) and YPd2Al3 (TSC = 2.2 K) 11) .…”