Author/Authors :
G. P. Denbeaux، نويسنده , , G. and Anderson، نويسنده , , E. and Chao، نويسنده , , W. and Eimüller، نويسنده , , T. and Johnson، نويسنده , , L. and Kِhler، نويسنده , , M. and Larabell، نويسنده , , C. and Legros، نويسنده , , M. and Fischer، نويسنده , , P. and Pearson، نويسنده , , A. and Schütz، نويسنده , , G. and Yager، نويسنده , , D. and Attwood، نويسنده , , D.، نويسنده ,
Abstract :
We report both technical advances in soft X-ray microscopy (XRM) and applications furthered by these advances. With new zone plate lenses we record test pattern features with good modulation to 25 nm and smaller. In combination with fast cryofixation, sub-cellular images show very fine detail previously seen only in electron microscopy, but seen here in thick, hydrated, and unstained samples. The magnetic domain structure is studied at high spatial resolution with X-ray magnetic circular dichroism (X-MCD) as a huge element-specific magnetic contrast mechanism, occurring e.g. at the L2,3 edges of transition metals. It can be used to distinguish between in-plane and out-of-plane contributions by tilting the sample. As XRM is a photon based technique, the magnetic images can be obtained in unlimited varying external magnetic fields. The images discussed have been obtained at the XM-1 soft X-ray microscope on beamline 6.1 at the Advanced Light Source in Berkeley.
Keywords :
high resolution , X-ray microscopy , Cryogenic preservation , Magnetic imaging
