A permanent magnetic film atom chip for Bose–Einstein condensation
A permanent magnetic film atom chip for Bose–Einstein condensation
复制标题
用于玻色-爱因斯坦凝聚的永磁薄膜原子芯片
DOI：
10.1088/0953-4075/39/1/004
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
A. Sidorov
中科院分区：
文献类型：
--
作者：
B. Hall;Shannon Whitlock;F. Scharnberg;P. Hannaford;A. Sidorov
我们提出了一种混合原子芯片，它将永磁薄膜与微机械载流结构相结合，用于实现玻色-爱因斯坦凝聚态（BEC）。一种具有大垂直磁化强度的新型 TbGdFeCo 材料经过专门设计，可为超冷原子提供小规模、稳定的磁势。我们能够在基于永磁薄膜或载流结构的磁阱中生产 87Rb BEC。使用凝结物作为磁场探针，我们进行冷原子磁力测量，以描绘场强度和梯度作为距磁性薄膜表面距离的函数。最后，我们讨论了永磁薄膜原子芯片的未来发展方向。
We present a hybrid atom chip which combines a permanent magnetic film with a micromachined current-carrying structure used to realize a Bose–Einstein condensate (BEC). A novel TbGdFeCo material with large perpendicular magnetization has been tailored to allow small scale, stable magnetic potentials for ultracold atoms. We are able to produce 87Rb BEC in a magnetic trap based on either the permanent magnetic film or the current-carrying structure. Using the condensate as a magnetic field probe we perform cold atom magnetometry to profile both the field magnitude and gradient as a function of distance from the magnetic film surface. Finally, we discuss future directions for our permanent magnetic film atom chip.