US 12,217,774 B2
Method for speed-up of magnetic signal readout from magnetic storage media by beam splitting
Sebastian Gliga, Zürich (CH); and Jörg Raabe, Villnachern (CH)
Assigned to Paul Scherrer Institut, Villigen PSI (CH)
Appl. No. 18/549,015
Filed by Paul Scherrer Institut, Villigen PSI (CH)
PCT Filed Feb. 28, 2022, PCT No. PCT/EP2022/054988
§ 371(c)(1), (2) Date Sep. 5, 2023,
PCT Pub. No. WO2022/184642, PCT Pub. Date Sep. 9, 2022.
Claims priority of application No. 21161010 (EP), filed on Mar. 5, 2021.
Prior Publication US 2024/0105215 A1, Mar. 28, 2024
Int. Cl. G11B 5/008 (2006.01); G11B 11/105 (2006.01)
CPC G11B 5/00813 (2013.01) [G11B 11/10545 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method for speeding up contactless readout of magnetic information stored on magnetic tapes, the magnetic information being encoded by a magnetization value and direction stored on the magnetic tapes, the method comprising steps of:
a) providing a first circularly polarized x-ray beam and a second circularly polarized x-ray beam;
b) orienting the first circularly polarized X-ray beam and the second circularly polarized X-ray beam towards a magnetic tape;
c) simultaneously reading out the first circularly polarized X-ray beam and the second circularly polarized X-ray beam after their passage through the same region of the magnetic tape while advancing the magnetic tape; and
d) determining the magnetic information by a difference between two respective readout signals from the first x-ray beam and the second x-ray beam based on X-ray magnetic circular dichroism.