1. NIST
Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg, Maryland 20899, United States
2. Institute of Magnetism, NASU of Ukraine, 03142 Kiev, Ukraine
3. Kiev National University, Institute of High Technologies, 03022 Kiev, Ukraine
4. Department
of Electrical and Computer Engineering, University of Minnesota, Minneapolis, Minnesota 55455, United States
5. Department
of Physics and Astronomy, University of Texas at San Antonio, San Antonio, Texas 78249, United States