Effect of Fock exchange on the electronic structure and magnetic coupling in NiO

I de PR Moreira, F Illas, RL Martin - Physical Review B, 2002 - APS
The effect of Fock exchange on the periodic description of the geometrical structure, elastic
constants, and electronic and magnetic properties of NiO is analyzed. Hybrid density …

Calculation of microscopic exchange interactions and modelling of macroscopic magnetic properties in molecule-based magnets

JJ Novoa, M Deumal, J Jornet-Somoza - Chemical Society Reviews, 2011 - pubs.rsc.org
The state-of-the-art theoretical evaluation and rationalization of the magnetic interactions
(JAB) in molecule-based magnets is discussed in this critical review, focusing first on …

Analysis of the magnetic coupling in binuclear complexes. I. Physics of the coupling

CJ Calzado, J Cabrero, JP Malrieu… - The Journal of chemical …, 2002 - pubs.aip.org
Accurate estimates of the magnetic coupling in binuclear complexes can be obtained from
ab initio configuration interaction (CI) calculations using the difference dedicated CI …

Analysis of the magnetic coupling in binuclear complexes. II. Derivation of valence effective Hamiltonians from ab initio CI and DFT calculations

CJ Calzado, J Cabrero, JP Malrieu… - The Journal of chemical …, 2002 - pubs.aip.org
Most interpretations of the magnetic coupling J between two unpaired electrons rest upon
simple valence models that involve essentially the ferromagnetic direct exchange …

Magnetic coupling in ionic solids studied by density functional theory

F Illas, RL Martin - The Journal of chemical physics, 1998 - pubs.aip.org
Magnetic coupling in ionic solids is studied using a density functional theory, DFT, approach
applied to suitable cluster models representing KNiF3, K2NiF4, and La2CuO4. A mapping …

Accurate Prediction of Large Antiferromagnetic Interactions in High- ( ) Superconductor Parent Compounds

D Muñoz, F Illas, I de PR Moreira - Physical Review Letters, 2000 - APS
The in-plane nearest-neighbor Heisenberg magnetic coupling constant, J, of La 2 CuO 4, Nd
2 CuO 4, Sr 2 CuO 2 Cl 2, YBa 2 Cu 3 O 6, and undoped HgBa 2 Ca n− 1 Cu n O 2 n+ 2+ δ …

Magnetic properties of organic molecular crystals via an algebraic Heisenberg Hamiltonian. Applications to WILVIW, TOLKEK, and KAXHAS nitronyl nitroxide crystals

M Deumal, MJ Bearpark, JJ Novoa… - The Journal of Physical …, 2002 - ACS Publications
A computational approach to the study of magnetism in molecular crystals is outlined, and
applications are presented for three purely organic nitronyl nitroxide (NN) crystals: WILVIW …

Accurate ab initio determination of magnetic interactions and hopping integrals in systems

CJ Calzado, JF Sanz, JP Malrieu - The Journal of Chemical Physics, 2000 - pubs.aip.org
The nature of magnetic interactions and electron transfer processes in La 2− x Sr x CuO 4
systems are studied, by means of an ab initio embedded cluster model approach, using a …

Proposal of an extended Hamiltonian for high- cuprates from ab initio calculations on embedded clusters

CJ Calzado, JP Malrieu - Physical Review B, 2001 - APS
A series of accurate ab initio calculations on Cu p O q finite clusters, properly embedded in
the Madelung potential of the infinite lattice, have been performed in order to determine the …

Derivation of spin Hamiltonians from the exact Hamiltonian: Application to systems with two unpaired electrons per magnetic site

I de PR Moreira, N Suaud, N Guihéry, JP Malrieu… - Physical Review B, 2002 - APS
The foundations and limits of S= 1 2 and S= 1 spin Hamiltonians for systems with two
unpaired electrons in two well-defined orbitals per site are discussed by merging accurate …