Specific heat of rare earth cobaltates RCoO3 (R=La, Pr and Nd)

Effect of Er substitution on ultrasonic anomaly in Dy0.5−xErxBa0.5CoO3 cobaltates

“…Rare-earth (RE) cobaltates with provskite structure of the general composition of the type RECoO 3 and hole-doped RE 1Àx A x CoO 3 as well as their half-doped RE 0.5 A 0.5 CoO 3 (where RE is a trivalent rare-earth ion such as La, Nd, Dy, and Gd, and A is a divalent alkaline-earth ion such as Sr, Ca or Ba) have been given fair attention in a recent years due to their unique magnetic and transport properties as well as the potential application [1][2][3][4][5][6]. In addition to the lattice, charge and spin degrees of freedom which are found in many other transition metal oxides, the cobaltates also display interesting features originating from the 'spin state' at Co-site [7,8].…”

Effect of cation doping on low-temperature specific heat of LaCoO3 cobaltate

“…The formulation of Rigid Ion Model (RIM) has been derived from the following interatomic interaction potential [22][23][24][25][26][27][28] jðrÞ ¼ À…”

“…The symbols involved in it are same as those defined in our earlier papers [22][23][24][25][26][27][28]. r kk 0 appearing in the first term on the right represents the separation between the nearest neighbours while r kk and r k 0 k 0 appearing in the next two terms are the second neighbour separations.…”

“…Besides, we have computed the molecular force constant, reststrahlen frequency and Debye temperature for La 1 À x Sr x CoO 3 (0.0rxr1.0) using the expressions given in our earlier papers [22][23][24][25][26][27][28]. The results are thus obtained and discussed below.…”

Specific heat and thermal expansion of GdCoO[sub 3]

“…In this work we have successfully portrayed the effect of temperature on bulk modulus (B), φ, υ, Debye temperature (θD) and Gruneisen parameter (γ) of GdCoO3 using the expressions given in ref. [4].…”