Abstract
The magnetism of layered NaxMnO2 with space group P63/mmc is investigated by first-principles calculation and magnetic measurement. Results indicate that NaMnO2 without any Na-vacancies posses the antiferromagnetic metal state. And along with Na-vacancies formed, the magnetism and electronic properties of NaxMnO2 show rich change, which undergo the change of AFM → FM → AFM and metal → semiconductor, respectively. Magnetic measurement of Na0.806MnO2−δ with space group P63/mmc also shows that have thin hysteresis and remanent under 5 K. Hence, Na0.806MnO2−δ presents the ferromagnetic metal state under low temperature rooting in the Mn3+-O2−-Mn4+ double exchange, which is agreement with theoretical results.
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