APPLIED PHYSICS LETTERS, vol. 88, no. 12, 2006-03-20
JOURNAL OF APPLIED PHYSICS, vol. 98, no. 10, 2005-11-15
PHYSICA B-CONDENSED MATTER, vol. 391, no. 1, page. 35 - 41, 2007-03-15
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, vol. 129, no. 1-3, page. 22 - 30, 2006-04-15