⁷⁵As-NQR Studies of Superconducting Filled Skutterudites PrRu₄As₁₂ and LaRu₄As₁₂

Ferromagnetic spin fluctuations in the filled skutterudite SrFe4As12 revealed by As75 NMR-NQR measurements

“…2 (b). Similar temperature dependence of ν NQR is observed in many filled skutterudite compounds [12,14,[28][29][30][31] where the temperature dependence at higher temperatures is found to obey an empirical relation ν…”

“…The compound crystallizes in a body-centered cubic structure with the space group Im3, and is now known to have a wide variety of compounds with the general formula AT 4 X 12 (A = alkali metal, alkaline earth metal, lanthanide, and actinide; T = Fe, Ru, Os, Co, Rh, Ir, and Pt; X = P, As, Sb, and Ge). These compounds have received much attention since they exhibit rich physical properties that include superconductivity, metal-insulator transition, ferromagnetism, antiferromagnetism, hybridization gaps (Kondo insulator behavior), nonfermi-liquid behavior, quadrupolar ordering, and field-induced heavy-fermion states [2][3][4][5][6][7][8][9][10][11][12][13][14][15], as well as excellent thermoelectric properties [16].…”

Suppression of ferromagnetic spin fluctuations in the filled skutterudite superconductor SrOs4As12 revealed by As75

“…2 (b). Similar temperature dependence of ν NQR has been observed in SrFe 4 As 12 [33] and also in other filled skutterudite compounds [23,[38][39][40][41][42] where the temperature dependence at higher temperatures is found to obey an empirical relation ν…”

Ferrimagnetism in EuFe4As12 revealed by Eu153 NMR and Ding1, Lee2, Nishine3 et al. 2020Phys. Rev. B0000View full textAdd to dashboardCite

“…4 (b). Similar temperature dependences of ν NQR have been observed in SrFe 4 As 12 [15], SrOs 4 As 12 [46] and also in other filled skutterudite compounds [42,[47][48][49][50][51] where the temperature dependence is found to obey an empirical relation ν NQR (T ) = ν NQR (0)(1 − α Q T 3/2 ) with a fitting parameter α Q [41]. As shown by the curve in Fig.…”