Tuning the magnetic ground state of a tetranuclear nickel(II) molecular complex by high magnetic fields

  title={Tuning the magnetic ground state of a tetranuclear nickel(II) molecular complex by high magnetic fields},
  author={Christian Golze and A. Alfonsov and R{\"u}diger Klingeler and Bernd Buchner and Vladislav Kataev and Christian Mennerich and H.-H. Klauss and Michel Goiran and J. M. Broto and H. Rakoto and Serhiy Demeshko and Guido Leibeling and Franc Meyer},
  journal={Physical Review B},
Electron spin resonance and magnetization data in magnetic fields up to 55 T of a novel multicenter paramagnetic molecular complex [L_2Ni_4(N_3)(O_2C Ada)_4](Cl O_4) are reported. In this compound, four Ni centers each having a spin S = 1 are coupled in a single molecule via bridging ligands (including a \mu_4-azide) which provide paths for magnetic exchange. Analysis of the frequency and temperature dependence of the ESR signals yields the relevant parameters of the spin Hamiltonian, in… 
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