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Presents a study that investigated the effect of lanthanum (La) on magnetic properties of magnets. Analysis of the sintering behavior and microstructure of La-substituted rare earth element-iron-boron magnets; Identification of phases in the La-containing magnets; Examination of the oxidation of La-containing rare earth element-rich alloys.

Presents a study which investigated the crystal structures and the compositions of the neodymium-rich phases in the Nd-Fe-B systems by means of transmission electron microscopy, x-ray diffraction, and Auger spectroscopy techniques. Details on the primary phase of the Nd-Fe-B magnets; Method used in preparing the samples; Observation on the neodymium-rich phase layers in sintered magnets; Description of the boron-rich phase grain.