TY - JOUR
T1 - Radio-frequency spectroscopy of the low-energy spectrum of the magnetic molecule Cr12 Cu2
AU - Martin, Catalin
AU - Engelhardt, Larry
AU - Baker, Michael L.
AU - Timco, Grigore A.
AU - Tuna, Floriana
AU - Winpenny, Richard E P
AU - Tregenna-Piggott, Philip L W
AU - Luban, Marshall
AU - Prozorov, Ruslan
PY - 2009/9/28
Y1 - 2009/9/28
N2 - 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, Cr12 Cu2. 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 Cr12 Cu2. © 2009 The American Physical Society.
AB - 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, Cr12 Cu2. 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 Cr12 Cu2. © 2009 The American Physical Society.
U2 - 10.1103/PhysRevB.80.100407
DO - 10.1103/PhysRevB.80.100407
M3 - Article
SN - 1098-0121
VL - 80
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
IS - 10
M1 - 100407
ER -