Ground state, magnetization process and magnetocaloric effect of the exactly tractable spin-electron tetrahedral chain

Abstract

A hybrid spin-electron system on one-dimensional tetrahedral chain, in which the localized Ising spin regularly alternates with the mobile electron delocalized over three lattice sites, is exactly investigated using the generalized decoration-iteration transformation. The system exhibits either the ferromagnetic or antiferromagnetic ground state depending on whether the ferromagnetic or antiferromagnetic interaction between the Ising spins and mobile electrons is considered. The enhanced magnetocaloric effect during the adiabatic demagnetization suggests a potential use of the investigated system for low-temperature magnetic refrigeration.

3 pages, 4 figures, contribution to proceedings of The European Conference PHYSICS OF MAGNETISM 2014 (PM'14) in Poznan, Poland

References in corpus (5)

• Exactly solvable Ising--Heisenberg chain with triangular XXZ-Heisenberg plaquettes
• Localized-magnon states in strongly frustrated quantum spin lattices
• Residual entropy and spin gap in a one-dimensional analog of the pyrochlore antiferromagnet
• Localized states on triangular traps and low-temperature properties of the antiferromagnetic Heisenberg and repulsive Hubbard models
• Phase transitions in exactly solvable decorated model of localized Ising spins and itinerant electrons

Cited by in corpus (6)

• Reentrant phase transitions of a coupled spin-electron model on doubly decorated planar lattices with two or three consecutive critical points
• Magnetic Gruneisen parameter and magnetocaloric properties of a coupled spin-electron double-tetrahedral chain
• Ground-state and magnetocaloric properties of a coupled spin-electron double-tetrahedral chain (exact study at the half filling)
• Reentrant phenomenon and inverse magnetocaloric effect in a generalized spin-(1/2,s) Fisher's super-exchange antiferromagnet
• Magnetization plateau as a result of the uniform and gradual electron doping in a coupled spin-electron double-tetrahedral chain
• Thermodynamics of the exactly solvable spin-electron tetrahedral chain