Radio-frequency spectroscopy of the low-energy spectrum of the magnetic molecule Cr12Cu2
| Title | Radio-frequency spectroscopy of the low-energy spectrum of the magnetic molecule Cr12Cu2 |
| Publication Type | Journal Article |
| Year of Publication | 2009 |
| Authors | Martin C, Engelhardt L, Baker ML, Timco GA, Tuna F, Winpenny REP, Tregenna-Piggott PLW, Luban M, Prozorov R |
| Journal Title | Physical Review B |
| Volume | 80 |
| Pages | 100407 |
| Date Published | 09/01 |
| ISBN Number | 1098-0121 |
| Accession Number | ISI:000270383100009 |
| Abstract | We present tunnel diode oscillator (TDO) measurements of dynamic magnetic susceptibility, inelastic neutron-scattering (INS) measurements, and theoretical predictions based on quantum Monte Carlo (QMC) calculations for a magnetic molecule system, Cr12Cu2. The TDO measurements show not only ground-state level crossings (as can also be observed in low-temperature dc magnetization measurements) but also clear evidence of crossings between certain excited energy levels. These TDO results are in excellent agreement with our theoretical predictions for a Heisenberg Hamiltonian and are further confirmed by our INS measurements. Our present findings demonstrate that the TDO technique is a valuable magnetic spectroscopic tool for studying magnetic molecules, and that the QMC method is a valuable tool for predicting properties of computationally demanding systems such as Cr12Cu2. |
| URL | <Go to ISI>://000270383100009 |
| DOI | 10.1103/Physrevb.80.100407 |
