Ionic size and atomic disorder effects on the charge-density-wave transitions inR5Ir4Si

Hall coefficient studies in R5Ir4Si10 (R=Dy–Lu) near the charge–density–wave transitions

“…A value of about R H ¼ 1 Â 10 À4 cm 3 C is observed for these compounds in the normal state, comparable to other CDW material [8]. The positive value of Hall coefficient at high temperatures in this class of materials signify that holetype carriers dominate their electrical transport, consistent with the thermoelectric power measurements [7]. By taking the mass density r ¼ 5:04 Â 10 3 mol/m 3 , a carrier concentration of n H ¼ 6:25 Â 10 28 m À3 or 1.1 holes per R site is obtained for these compounds.…”

“…The Hall measurement was taken in a magnetic field of 7 T and at a DC current density of 50 A/cm 2 . All measured electrical transport properties were performed on pieces of the same crystals for which the specific heat had previously been studied [7].…”

“…Note that their thermoelectric powers (S) remain positive at these temperatures [7]. On the other hand, the Hall coefficient for Lu is positive at all temperatures while its S changes sign from positive to negative at T CDW ¼ 80 K [4].…”

“…Both T CDW and T Lock-in decrease quasilinearly with decreasing lattice parameters with rare-earth ions from Dy to Lu [7]. Besides, the N!…”

Direct observation of remarkable crystalline-electric-field effect in quasi-two-dimensional antiferromagnet Er5Ir4Si10 single crystal by low-temperature specific heat

“…The attractive phenomena in this ternary compound are antiferromagnetic phase transition [1][2][3][4][5][6][7], superconducting phase transition [1,[8][9][10][11][12][13][14][15], charge-density wave phase transition [16][17][18][19][20][21][22][23][24][25][26][27][28][29] and the nuclear magnetism [7]. This compound group crystallizes in the tetragonal Sc 5 Co 4 Si 10 -type crystal structure and the space group * Corresponding author.…”