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Elastic and thermodynamic properties of AVO _3 (A=Sr, Pb) perovskites

机译:钙钛矿AVO _3(A = Sr,Pb)的弹性和热力学性质

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We have investigated the elastic and thermodynamic properties for the perovskite type metavanadate SrVO _3 and the multiferroic PbVO _3, probably for the first time by the means of a Modified Rigid Ion Model (MRIM). We present the elastic constants (C _(11), C _(12), C _(44)) and other elastic properties like Bulk modulus (B), Young′s modulus (E), shear modulus (G), Poisson′s ratio (σ) and wave velocity (υ _l, υ _s, υ _m). Besides we have reported the thermodynamic properties molecular force constant (f), Reststrahlen frequency (ν), cohesive energy (φ), Debye temperature (θ _D) and Gruneisen parameter (γ). We have also computed the variation of heat capacity (C _P) and there by volume thermal expansion coefficient (α) in a wide temperature range. We found that the computed properties reproduce well with the available data in literature. To our knowledge some of the properties are reported for the first time.
机译:我们研究了钙钛矿型偏钒酸盐SrVO _3和多铁性PbVO _3的弹性和热力学性质,这可能是第一次通过改进的刚性离子模型(MRIM)进行。我们给出了弹性常数(C _(11),C _(12),C _(44))和其他弹性特性,例如体积模量(B),杨氏模量(E),剪切模量(G),泊松的比率(σ)和波速(υ_l,υ_s,υ_m)。此外,我们还报道了热力学性质的分子力常数(f),Reststrahlen频率(ν),内聚能(φ),德拜温度(θ_D)和Gruneisen参数(γ)。我们还计算了在较宽温度范围内的热容(C _P)的变化,并根据体积热膨胀系数(α)进行了计算。我们发现,利用文献中的可用数据可以很好地再现计算出的属性。据我们所知,一些特性是第一次被报道。

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