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Microwave frequency standards based on ions have made great progress over the past decades; a microwave atomic clock based on laser cooled 113Cd+ ions at Tsinghua University is carried out for about five years. In order to further improve the performance of the clock, a new experiment setup with dual traps and two kinds of ions was proposed. This paper reports our recent experimental progress of the...
The magnetocrystalline anisotropy of a ferromagnet is determined by its crystal structure and is thus an inherent source of magnetic anisotropy.[1,2] It is the key to an understanding of ferromag-netism itself and is still actively investigated even for apparently well-understood materials such as Fe.[3-5] The magnetocrystalline anisotropy energy of bcc Fe can be expressed in terms of the direction...
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