In this paper we discuss ion-induced ultra fast demagnetization and present an approach for experimental investigation of the following magnetization dynamics. The effect, if confirmed, might have applications in spintronics, micro-scale power generation or communication and for basic research in the area of ion track formation as a mean to observe thermodynamics in ion tracks. The proposed approach lies in using magnetic antenna for detection of the field change induced by ion stopping and converting the field change to electrical signal. The approach was confirmed feasible, providing temporal resolution below 100ps in tests with other fast impulse heat source – a femtosecond laser. Presented experimental results and simulations based on ion-induced thermal spike model show a necessity to develop broadband antennas with high sensitivity and micro-scale dimensions together with specialized high frequency amplifier electronics, in order to allow observation of ultra-fast ion-induced demagnetization.

1.
Speidel
,
K. H.
 et al 
Evidence for the ion-induced electronic spike on fs and nm scales from transient field measurements
.
Nucl. Instruments Methods Phys. Res. Sect. B Beam Interact. with Mater. Atoms
(
2004
). doi:
2.
Obodovskiy
,
I.
Fundamentals of Radiation and Chemical Safety
.
Fundamentals of Radiation and Chemical Safety
(
2015
). doi:
3.
Lang
,
M.
,
Devanathan
,
R.
,
Toulemonde
,
M.
&
Trautmann
,
C.
Advances in understanding of swift heavy-ion tracks in complex ceramics
.
Current Opinion in Solid State and Materials Science
(
2015
). doi:
4.
Beaurepaire
,
E.
,
Merle
,
J. C.
,
Daunois
,
A.
&
Bigot
,
J. Y.
Ultrafast spin dynamics in ferromagnetic nickel
.
Phys. Rev. Lett.
(
1996
). doi:
5.
Toulemonde
,
M.
 et al 
Experimental phenomena and thermal spike description of ion Tracks in Amorphisable Inorganic Insulators
,. (
2006
).
6.
Jiang
,
L.
,
Wang
,
A. D.
,
Li
,
B.
,
Cui
,
T. H.
&
Lu
,
Y. F.
Electrons dynamics control by shaping femtosecond laser pulses in micro/nanofabrication: Modeling, method, measurement and application
.
Light: Science and Applications
(
2018
). doi:
7.
Ziegler
,
J. F.
James
F.
,
Biersack
,
J. P.
&
Ziegler
,
M. D.
SRIM, the stopping and range of ions in matter
.
Nucl. Instruments Methods Phys. Res. B
(
2008
). doi:
This content is only available via PDF.
You do not currently have access to this content.