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We obtain analytical expressions for the total magnetic moment and the static spin-correlation functions of the classical Heisenberg model for ultrasmall systems of spins ~u it vectors!, thatâ€¦ (More)

We provide exact analytical expressions for the magnetic susceptibility function in the high temperature expansion for finite Heisenberg spin systems with an arbitrary coupling matrix, arbitraryâ€¦ (More)

- Zi-hey Jang, Byoung Jin Suh, +4 authors Marshall Luban
- The Review of scientific instruments
- 2008

We have developed a nonconventional broadband electron spin resonance (ESR) spectrometer operating continuously in the frequency range from 0.5 to 9 GHz. Dual antenna structure and the microwaveâ€¦ (More)

- Christian SchrÃ¶der, Hiroyuki Nojiri, JÃ¼rgen Schnack, Peter Hage, Marshall Luban, Paul KÃ¶gerler
- Physical review letters
- 2005

We identify a class of zero-dimensional classical and quantum Heisenberg spin systems exhibiting anomalous behavior in an external magnetic field B similar to that found for the geometricallyâ€¦ (More)

We investigate classes of quantum Heisenberg spin systems which have different coupling constants but the same energy spectrum and hence the same thermodynamical properties. To this end we defineâ€¦ (More)

We investigate the ground states of classical Heisenberg spin systems which have point group symmetry. Examples are the regular polygons (spin rings) and the seven quasi-regular polyhedra includingâ€¦ (More)

In an effort to understand the low temperature behavior of recently synthesized molecular magnets we present numerical evidence for the existence of a rotational band in systems of quantum spinsâ€¦ (More)

Analytical solutions for the time-dependent autocorrelat ion function of the classical and quantum mechanical spin dimer with arbitrary spin are prese nted and compared. For large spin quantumâ€¦ (More)

- Andrew McRobbie, Asad R Sarwar, +11 authors Richard E P Winpenny
- Chemical communications
- 2011

Hexametallic chromium(III) chains can act as fluoride donor ligands to lanthanide ions giving {(Cr(6))Ln(x)}(n) complexes; preliminary spectroscopic studies are reported.

- Xikui Fang, Paul KÃ¶gerler, Manfred Speldrich, Helmut Schilder, Marshall Luban
- Chemical communications
- 2012

Ligand modification transforms a polyoxometalate-anchored cubane-type [Mn(III)(3)Mn(IV)O(4)] core into a centrosymmetric [Mn(III)(6)Mn(IV)O(8)] di-cubane cluster, and restores the slow magnetizationâ€¦ (More)