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Feasibility study of micro‐undulator for T‐ray sources by using FEM
Author(s) -
Jang Pyungwoo,
Rhie Keungwon,
Lee Byungcheol
Publication year - 2007
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.200777122
Subject(s) - undulator , perpendicular , layer (electronics) , finite element method , materials science , magnet , optics , magnetic field , x ray , physics , composite material , radiation , mechanical engineering , engineering , structural engineering , geometry , mathematics , quantum mechanics
Possibility of development of micro‐undulator utilizing perpendicular magnetic recording was explored by 2‐D FEM simulation. In the simulation FePt and CoCr layer were compared as an appropriate recording layer of the undulator. Also variation of maximum field and THD with aspect ratio and gap height were simulated so that they should be optimized in a given thickness of recording layer. From both the simulation results and Bitter patterns recorded on FePt/Fe micro‐undulator, the possibility of development of micro‐undulator by utilizing perpendicular recording technique could be confirmed. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)