Ferromagnetic behavior of ultrathin manganese nanosheets
arXiv:1205.1313 · doi:10.1021/jp204765e
Abstract
Ferromagnetic behaviour has been observed experimentally for the first time in nanostructured Manganese. Ultrathin ( 0.6 nm) Manganese nanosheets have been synthesized inside the two dimensional channels of sol-gel derived Na-4 mica. The magnetic properties of the confined system are measured within 2K-300K temperature range. The confined structure is found to show a ferromagnetic behaviour with a nonzero coercivity value. The coercivity value remains positive throughout the entire temperature range of measurement. The experimental variation of susceptibility as a function of temperature has been satisfactorily explained on the basis of a two dimensional system with a Heisenberg Hamiltonian involving direct exchange interaction.
13 pages, 9 figures