Hyperfine-enhanced nuclear spin order of PrPb3

La substitution effect and hyperfine-enhancedP141rnuclear spin dynamics inPrPb3Tokunaga1, Sakai2, Chudo3 et al. 2010Phys. Rev. B90150View full textAdd to dashboardCite

“…In addition, the value of K Pr is greatly enlarged by the hyperfine enhancement mechanism, which has been estimated to be ͑1+K Pr ͒Ӎ30 from magnetization data at temperatures below 1 K. 10 From these facts, one can safely assume that La Ӷ Pr and hence that the ␤ term in Eq. ͑4͒ is dominant.…”

“…On the other hand, the compound also undergoes nuclear ordering of the 141 Pr with an ordering temperature T NO = 5 mK. 10 The relatively high T NO is considered to be related to hyperfine enhancement effects. The hyperfine-enhanced 141 Pr nuclear magnetism has also been detected by recent muon spinrotation and spin-relaxation measurements.…”

Magnetic ordering of hyperfine-coupled nuclear and4f-electron moments in the clathrate compoundPr3Pd20Ge6Iwakami1, Namisashi2, Abe3 et al. 2014Phys. Rev. B3010View full textAdd to dashboardCite

“…Therefore, the susceptibility increase below 30 mK is accounted for principally by the HFE Pr nuclear magnetism caused by the 3 ground state at the 8c site. The HFE nuclear magnetism due to the non-Kramers 3 ground state has been observed in several materials, such as PrMg 3 , PrPb 3 , and PrV 2 Al 20 [7,9,30]. On the other hand, the increase in χ expected from the Pr nuclei at the 4a site as shown by the dashed line was not observed down to the lowest temperature.…”

“…We concluded that the susceptibility peak and the relaxation time maximum at T N2 can be ascribed to the HFE Pr nuclear magnetic phase transition at the 8c site. Figure 4 shows the HFE nuclear magnetic ordering temperatures in Pr compounds as a function of K squared [1,2,9,31]. According to Andres [32], HF nuclear transition temperatures increase approximately in proportion to the square of K. Owing to a large enhancement factor (1 + K 8c 39.4), the nuclear transition temperature of the 8c site in Pr 3 Pd 20 Ge 6 is much higher than those in other Pr compounds.…”

“…The interplay with electrons must bring the diversity in HFE nuclear magnetism, so it is intriguing to study the Pr nuclear spin in the phase where the 4f electrons exhibit electric quadrupole ordering. However, HFE nuclear ordering in the electric quadrupole ordered phase has been * Corresponding author: ou4.e-66@stu.kanazawa-u.ac.jp observed only in PrPb 3 at 5 mK [9]. In PrPb 3 , the exotic antiferromagnetic (AFM) structures due to the two different antiferroquadrupole (AFQ) sublattices have been predicted [4].…”