Multiple nearest-neighbor exchange model for the frustrated magnetic molecules {Mo72Fe30} and {Mo72Cr30}

@article{Schroder2008MultipleNE,
  title={Multiple nearest-neighbor exchange model for the frustrated magnetic molecules \{Mo72Fe30\} and \{Mo72Cr30\}},
  author={C. Schroder and R. Prozorov and P. Kogerler and M. Vannette and X. Fang and M. Luban and A. Matsuo and K. Kindo and A. Muller and A. Todea},
  journal={Physical Review B},
  year={2008},
  volume={77},
  pages={224409}
}
Our measurements of the differential susceptibility $\ensuremath{\partial}M/\ensuremath{\partial}H$ of the frustrated magnetic molecules ${{\text{Mo}}_{72}{\text{Fe}}_{30}}$ and ${{\text{Mo}}_{72}{\text{Cr}}_{30}}$ reveal a pronounced dependence on magnetic field $(H)$ and temperature $(T)$ in the low $H$\char21{}low $T$ regime, contrary to the predictions of the existing models. Excellent agreement with experiment is achieved upon formulating a nearest-neighbor classical Heisenberg model where… Expand

Figures from this paper

Evidence of low-energy singlet excited states in the spin- 1 2 polyhedral clusters { M o 72 V 30 } and { W 72 V 30 } with strongly frustrated kagome networks
Magnetization, specific heat, and electron spin resonance (ESR) measurements are carried out to clarify the low-energy excitations for the S = 1/2 polyhedral clusters {Mo$_{72}$V$_{30}$} andExpand
Spin freezing and slow magnetization dynamics in geometrically frustrated magnetic molecules with exchange disorder.
TLDR
It is suggested that the low temperature and low magnetic field nuclear magnetic resonance (NMR) measurements on {Mo(72)Fe(30)}, showing rapid and strong broadening of the proton line width on cooling below 600 mK, are evidence for a crossover from paramagnetic behaviour to a frozen spin configuration. Expand
High-order coupled cluster method study of frustrated and unfrustrated quantum magnets in external magnetic fields.
TLDR
Higher-order calculations are suggested for both SWT and CCM LSUBm calculations in order to determine the value of χ for the triangular lattice conclusively, which is below the result of SWT but in agreement with the results from other approximate methods. Expand
Electronic structure and soft-X-ray-induced photoreduction studies of iron-based magnetic polyoxometalates of type {(M)M5}12Fe(III)30 (M = Mo(VI), W(VI)).
TLDR
It is observed that the photoreduction rate greatly depends on the ligand structure surrounding the Fe ions, with negatively charged ligands leading to a dramatically reduced photoreduct rate, opening the possibility of tailoring such polyoxometalates by X-ray spectroscopic studies and also for potential applications in the field of X- Ray induced photochemistry. Expand
Structure-related frustrated magnetism of nanosized polyoxometalates: aesthetics and properties in harmony.
TLDR
The magnetic properties of selected nanosized polyoxometalate clusters featuring spin triangles as their magnetic 'building blocks' or fragments are discussed, which allow the study of the implications of frustrated spin ordering. Expand
Cubic assembly of a geometrically frustrated {Fe12} spin cluster.
TLDR
The finite temperature Lanczos method has been employed to calculate the temperature dependent magnetic properties of an analogous dodecanuclear S(i) = 3/2 model spin system, in order to reduce the very large Hilbert space. Expand
Reversible redox activity of {Mo72Fe30} nano-polyoxometalate cluster in three crystalline forms
Abstract The {Mo72Fe30} cluster is the basic unit of three crystalline materials rhombohedral [Mo72Fe30O252(CH3COO)12{Mo2O7(H2O)}2{H2Mo2O8(H2O)}(H2O)91]·150H2O (1), orthorhombicExpand
Fate of a giant {Mo72Fe30}-type polyoxometalate cluster in an aqueous solution at higher temperature: understanding related Keplerate chemistry, from molecule to material.
TLDR
This simple approach not only generates nanoferric molybdate at a moderate temperature but also helps to understand the stability of {Mo72Fe30} in terms of the linker-pentagon complementary relationship. Expand
Properties of highly frustrated magnetic molecules studied by the finite-temperature Lanczos method
Abstract. The very interesting magnetic properties of frustrated magnetic molecules are often hardly accessible due to the prohibitive size of the related Hilbert spaces. The finite-temperatureExpand
Dynamic magnetic susceptibility of systems with long-range magnetic order
The utility of the TDR as an instrument in the study of magnetically ordered materials has been expanded beyond the simple demonstration purposes. Results of static applied magnetic field dependentExpand
...
1
2
3
4
...