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An atomic magnetometer based on coherent population trapping(CPT)resonances in microfabricated vapor cells is demonstrated.Fabricated by the micro-electro-mechanical-system(MEMS)technology,the cells are filled with Rb and Ne at a controlled pressure.An experimental apparatus is built for characterizing properties of microfabricated vapor cells via the CPT effects.The typical CPT linewidth is measured to be about 3 kHz(1.46 kHz with approximately zero laser intensity)for the rubidium D1 line at about 90 ℃.The effects of pressure,temperature and laser intensity on CPT linewidth are studied experimentally.A closed-loop atomic magnetometer is finally finished with a sensitivity of 210.5 pT/Hz1/2 at 1 Hz bandwidth.This work paves the way for developing an integrated chip-scale atomic magnetometer in the future.