Work

Double-exchange magnets: Spin dynamics in the paramagnetic phase

Year: 1999

Type: article

Abstract: The electronic structure of perovskite manganese oxides is investigated in terms of a Kondo lattice model with ferromagnetic Hund coupling and antiferromagnetic exchange between ${t}_{2g}$ spins using a finite temperature diagonalization technique. Results for the dynamic structure factor are consistent with recent neutron-scattering experiments for the bilayer manganite ${\mathrm{La}}_{1.2}{\mathrm{Sr}}_{1.8}{\mathrm{Mn}}_{2}{\mathrm{O}}_{7}.$ The susceptibility shows Curie-Weiss behavior and is used to derive a phase diagram. In the paramagnetic phase with pronounced antiferromagnetic fluctuations charge carriers form ferromagnetic polarons.

Source: Physical review. B, Condensed matter

DOI: 10.1103/physrevb.59.r14149

Authors: Peter Horsch, Janez Jaklič, Frank Mack

Institutions: Max Planck Institute for Solid State Research, Max Planck Institute for the Physics of Complex Systems

Language: English

Topic: Magnetic and transport properties of perovskites and related materials

Subfield: Electronic, Optical and Magnetic Materials

Field: Materials Science

Domain: Physical Sciences

Open Access status: green

OpenAlex ID: W2146615440

FWCI: 0.296

Cites: 19

Cited by: 14

Related to: 10