Abstract
A networked neodymium-O-phenylene-O-ytterbium ternary hybrid copolymer was calcined under vacuum at 400, 500, 600, and 700°C obtain black-colored materials composed of carbon clusters and nano-sized Yb2O3 and Nd compound particles. ESR spectral examinations showed that the calcined materials have a free electron on carbon clusters via electron transfer between carbon clusters and metal compounds. From the changes of ESR signal intensity of the calcined materials under magnetic field impression, spin relaxation in the neodymium atom is presumed to be controlled by a spin interaction with the ytterbium atom.
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