We have extensively studied the magnetic features of a heterometallic molecular trimer, Cr2Cu. We havecharacterized molecular Cr2Cu by low-temperature ac susceptibility and specific-heat measurements and thisallowed us to determine the microscopic parameters of the spin Hamiltonian. Then, we used x-ray magneticcircular dichroism to selectively probe local symmetries, electronic configuration, orbital, and spin magneticmoments of the magnetic ions. We found that at low temperatures only the ground state S=3/2 is occupied andthe spin of Cu is found opposite to that of Cr in agreement with spin-Hamiltonian calculations.
Probing local magnetization in molecular heterometallic Cr2Cu trimer / Lorusso, Giulia; V., Corradini; A., Candini; A., Ghirri; Biagi, Roberto; Del Pennino, Umberto; S., Carretta; E., Garlatti; P., Santini; G., Amoretti; G., Timco; R. G., Pritchard; R. E. P., Winpenny; Affronte, Marco. - In: PHYSICAL REVIEW. B, CONDENSED MATTER AND MATERIALS PHYSICS. - ISSN 1098-0121. - STAMPA. - 82:(2010), pp. 144420-144426. [10.1103/PhysRevB.82.144420]
Probing local magnetization in molecular heterometallic Cr2Cu trimer
LORUSSO, Giulia;BIAGI, Roberto;DEL PENNINO, Umberto;AFFRONTE, Marco
2010
Abstract
We have extensively studied the magnetic features of a heterometallic molecular trimer, Cr2Cu. We havecharacterized molecular Cr2Cu by low-temperature ac susceptibility and specific-heat measurements and thisallowed us to determine the microscopic parameters of the spin Hamiltonian. Then, we used x-ray magneticcircular dichroism to selectively probe local symmetries, electronic configuration, orbital, and spin magneticmoments of the magnetic ions. We found that at low temperatures only the ground state S=3/2 is occupied andthe spin of Cu is found opposite to that of Cr in agreement with spin-Hamiltonian calculations.
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