scholarly journals X-ray detection of ultrashort spin current pulses in synthetic antiferromagnets

2020 ◽  
Vol 127 (22) ◽  
pp. 223902
Author(s):  
C. Stamm ◽  
C. Murer ◽  
M. S. Wörnle ◽  
Y. Acremann ◽  
R. Gort ◽  
...  
Keyword(s):  
Spin Current ◽  
X Ray ◽  
Current Pulses

scholarly journals Femtosecond Spin Current Pulses Generated by the Nonthermal Spin-Dependent Seebeck Effect and Interacting with Ferromagnets in Spin Valves

2017 ◽  
Vol 119 (1) ◽  
Author(s):  
Alexandr Alekhin ◽  
Ilya Razdolski ◽  
Nikita Ilin ◽  
Jan P. Meyburg ◽  
Detlef Diesing ◽  
...  
Keyword(s):  
Spin Current ◽  
Seebeck Effect ◽  
Spin Valves ◽  
Current Pulses

scholarly journals Coherent ac spin current transmission across an antiferromagnetic CoO insulator

2019 ◽  
Vol 10 (1) ◽  
Author(s):  
Q. Li ◽  
M. Yang ◽  
C. Klewe ◽  
P. Shafer ◽  
A. T. N’Diaye ◽  
...  
Keyword(s):  
Spin Current ◽  
Spin Precession ◽  
Fundamental Physics ◽  
Time Resolved ◽  
Pump Probe ◽  
Insulating Layer ◽  
X Ray ◽  
Current Transmission ◽  
Measurement Results ◽  
Probe Measurements

AbstractThe recent discovery of spin current transmission through antiferromagnetic insulating materials opens up vast opportunities for fundamental physics and spintronics applications. The question currently surrounding this topic is: whether and how could THz antiferromagnetic magnons mediate a GHz spin current? This mismatch of frequencies becomes particularly critical for the case of coherent ac spin current, raising the fundamental question of whether a GHz ac spin current can ever keep its coherence inside an antiferromagnetic insulator and so drive the spin precession of another ferromagnet layer coherently? Utilizing element- and time-resolved x-ray pump-probe measurements on Py/Ag/CoO/Ag/Fe75Co25/MgO(001) heterostructures, here we demonstrate that a coherent GHz ac spin current pumped by the Py ferromagnetic resonance can transmit coherently across an antiferromagnetic CoO insulating layer to drive a coherent spin precession of the Fe75Co25 layer. Further measurement results favor thermal magnons rather than evanescent spin waves as the mediator of the coherent ac spin current in CoO.

scholarly journals Laser-induced ultrafast spin current pulses: a thermodynamic approach

2017 ◽  
Vol 29 (21) ◽  
pp. 214002 ◽  
Author(s):  
A Fognini ◽  
T U Michlmayr ◽  
A Vaterlaus ◽  
Y Acremann
Keyword(s):  
Spin Current ◽  
Thermodynamic Approach ◽  
Current Pulses

scholarly journals All-optical generation and detection of subpicosecond ac spin-current pulses in GaAs

2008 ◽  
Vol 78 (4) ◽  
Author(s):  
Brian A. Ruzicka ◽  
Karl Higley ◽  
Lalani K. Werake ◽  
Hui Zhao
Keyword(s):  
Spin Current ◽  
Current Pulses ◽  
Optical Generation ◽  
All Optical

scholarly journals X-ray Detection of Transient Magnetic Moments Induced by a Spin Current in Cu

2015 ◽  
Vol 115 (9) ◽  
Author(s):  
R. Kukreja ◽  
S. Bonetti ◽  
Z. Chen ◽  
D. Backes ◽  
Y. Acremann ◽  
...  
Keyword(s):  
Magnetic Moments ◽  
Spin Current ◽  
X Ray

Performances of Epitaxial Diamond in the Field of X-ray Diagnostics

2007 ◽  
Vol 1039 ◽  
Author(s):  
Claudio Manfredotti ◽  
Alessandro Lo Giudice ◽  
S. Almaviva ◽  
G. Verona-Rinati
Keyword(s):  
Coming Out ◽  
Pulse Shape ◽  
Chemical Vapour ◽  
Silicon Detector ◽  
Ionization Chambers ◽  
Diamond Detector ◽  
Detector Arrays ◽  
X Ray ◽  
Current Pulses ◽  
Pulse Timing

AbstractA thin epitaxial single crystal CVD (Chemical Vapour Deposited) diamond detector has been used in order to monitor the X-ray pulses coming out from a standard, portable, medical X-ray apparatus. The current pulses have been acquired and digitized in order to obtain the pulse shape, timing and dose. The obtained data were successfully compared with standard X-ray monitors like air ionization chambers and silicon detector arrays. The results strongly suggest a possible use of CVD epitaxial diamond in the field of X-ray diagnostics for energies up to 120 keV and doses up to 125 mGy and for X-ray pulse timing from 0.1 s or below and 2 s or more.

scholarly journals Terahertz spin current pulses controlled by magnetic heterostructures

2013 ◽  
Vol 8 (4) ◽  
pp. 256-260 ◽  
Author(s):  
T. Kampfrath ◽  
M. Battiato ◽  
P. Maldonado ◽  
G. Eilers ◽  
J. Nötzold ◽  
...  
Keyword(s):  
Spin Current ◽  
Current Pulses ◽  
Magnetic Heterostructures

scholarly journals Direct Detection of Pure ac Spin Current by X-Ray Pump-Probe Measurements

2016 ◽  
Vol 117 (7) ◽  
Author(s):  
J. Li ◽  
L. R. Shelford ◽  
P. Shafer ◽  
A. Tan ◽  
J. X. Deng ◽  
...  
Keyword(s):  
Direct Detection ◽  
Spin Current ◽  
Pump Probe ◽  
X Ray ◽  
Probe Measurements
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