Spin fluctuations in nearly magnetic metals from ab-initio dynamical spin susceptibility calculations:application to Pd and Cr95V5

Abstract

We describe our theoretical formalism and computational scheme for making ab-initio calculations of the dynamic paramagnetic spin susceptibilities of metals and alloys at finite temperatures. Its basis is Time-Dependent Density Functional Theory within an electronic multiple scattering, imaginary time Green function formalism. Results receive a natural interpretation in terms of overdamped oscillator systems making them suitable for incorporation into spin fluctuation theories. For illustration we apply our method to the nearly ferromagnetic metal Pd and the nearly antiferromagnetic chromium alloy Cr95V5. We compare and contrast the spin dynamics of these two metals and in each case identify those fluctuations with relaxation times much longer than typical electronic `hopping times'

21 pages, 9 figures. To appear in Physical Review B (July 2000)

References in corpus (4)

• Competitions in layered ruthenates: ferro- vs. antiferromagnetism and triplet vs. singlet pairing
• Linear Response Calculations of Spin Fluctuations
• p-wave and d-wave superconductivity in quasi-two-dimensional metals
• The strongly enhanced magnetic excitations near the quantum critical point of Cr${}_{1-x}$V${}_x$ and why strong exchange enhancement need not imply heavy fermion behavior

Cited by in corpus (8)

• Different dimensionality trends in the Landau damping of magnons in iron, cobalt and nickel: time dependent density functional study
• Theory of Local Dynamical Magnetic Susceptibilities from the Korringa-Kohn-Rostoker Green Function Method
• Direct observation of paramagnons in palladium
• Spin spirals in ordered and disordered solids
• Tuning paramagnetic spin-excitations of single adatoms
• Electric field control of magnons in magnetic thin films: ab initio predictions for 2D metallic heterostructures
• Spin-fluctuation and spin-relaxation effects of single adatoms from first principles
• Eigenmodes of a disordered FeCo magnonic crystal at finite temperatures