Shigeru Kasahara

Low temperature specific heat of superconducting ternary intermetallics La3Pd4Ge4, La3Ni4Si4, and La3Ni4Ge4 with U3Ni4Si4-type structure

A systematic investigation on the thermodynamic properties of La-based ternary intermetallic superconductors crystallizing in a U(3)Ni(4)Si(4)-type structure is presented. The U(3)Ni(4)Si(4)-type structure consists of a characteristic intergrowth of periodic BaAl(4) (ThCr(2)Si(2))-xa0and AlB(2)-type segments. Pristine low temperature specific heat data for recently discovered members La(3)Ni(4)Si(4) and La(3)Ni(4)Ge(4) with T(c)s of 1.0 and 0.7xa0K, respectively, are presented as well as La(3)Pd(4)Ge(4) with the highest T(c) of 2.5xa0K in the U(3)Ni(4)Si(4)-type group. Owing to the higher T(c)s of U(3)Ni(4)Si(4)-type superconductors than the related ThCr(2)Si(2)-type compounds, comparisons are drawn in our investigations of the ternary intermetallics of LaPd(2)Ge(2), LaNi(2)Si(2), and LaNi(2)Ge(2) having a ThCr(2)Si(2)-type structure. Our investigations of the thermodynamic properties show that La(3)Ni(4)Si(4) and La(3)Ni(4)Ge(4) have higher values of γ(n), N(E(F)), and Θ(D) than La(3)Pd(4)Ge(4). The same trend was found in ThCr(2)Si(2)-type compounds of LaPd(2)Ge(2), LaNi(2)Si(2), and LaNi(2)Ge(2). It turns out that the difference in T(c) between La(3)Pd(4)Ge(4), La(3)Ni(4)Si(4), and La(3)Ni(4)Ge(4), as well as the relatively higher T(c) of the U(3)Ni(4)Si(4)-type superconductors than of the related ThCr(2)Si(2)-type compounds, are largely due to the strength of electron-phonon coupling.Low temperature specific heat has been investigated in a novel ternary superconductor La_{3}Pd_{4}Ge_{4} with an U_{3}Ni_{4}Si_{4}-type structure consisting of the alternating BaAl_{4} (ThCr_{2}Si_{2})- and AlB

Low temperature specific heat of La_{3}Pd_{4}Ge_{4} with U_{3}Ni_{4}Si_{4}-type structure

_{2}

Local Field Measurements in PrOs4Sb12 with Broken Time‐Reversal Symmetry

-type layers. A comparative study with the related ThCr_{2}Si_{2}-type superconductor LaPd_{2}Ge_{2}, one of the layers in La_{3}Pd_{4}Ge_{4}, is also presented. nFrom the normal state specific heat, the Sommerfeld coefficient

Superconducting properties of noncentrosymmetric Li2(Pt1-xPdx)3B superconductors

gamma_{n} = 27.0

Specific-heat studies of the spin-orbit interaction in noncentrosymmetric Li 2 ( Pd 1 − x Pt x ) 3 B ( x = 0 , 0.5 , 1 ) superconductors

mJ/mol K^2 and the Debye temperature

Low temperature specific heat of ternary germanide superconductor La3Pd4Ge4

Theta_{rm D}

Positive local magnetization in the superconducting state of PrOs4Sb12

= 256 K are derived for the La_{3}Pd_{4}Ge_{4}, while those for the LaPd_{2}Ge_{2} are

Specific heat of novel ternary superconductors La3Ni4X4 (X = Si and Ge)

gamma_{n} =8.26

Specific heat of Li2(Pd1-xPtx)3B superconductors [x=0, 0.5, and 1]

mJ/mol K^2 and

Pressure effect and superconducting properties of lithium ternary borides

Theta_{rm D}