%0 Journal Article %T Combined chips for atom-optics %A A. Guenther %A M. Kemmler %A S. Kraft %A C. J. Vale %A C. Zimmermann %A J. Fortagh %J Physics %D 2005 %I arXiv %R 10.1103/PhysRevA.71.063619 %X We present experiments with Bose-Einstein condensates on a combined atom chip. The combined structure consists of a large-scale "carrier chip" and smaller "atom-optics chips", containing micron-sized elements. This allows us to work with condensates very close to chip surfaces without suffering from fragmentation or losses due to thermally driven spin flips. Precise three-dimensional positioning and transport with constant trap frequencies are described. Bose-Einstein condensates were manipulated with submicron accuracy above atom-optics chips. As an application of atom chips, a direction sensitive magnetic field microscope is demonstrated. %U http://arxiv.org/abs/cond-mat/0504209v2