Antiferromagnets are enriching spintronics research by many favorable properties that include insensitivity to magnetic fields, neuromorphic memory characteristics, and ultra-fast spin dynamics. Designing memory devices with electrical writing and reading is one of the central topics of antiferromagnetic spintronics. So far, such a combined functionality has been demonstrated via 90° reorientations of the Néel vector generated by the current-induced spin-orbit torque and sensed by the linear-response anisotropic magnetoresistance. [1, 2]
In my presentation I will show electrically control and detection of 180° Néel vector reversals in a collinear antiferromagnet with broken time reversal and spatial inversion symmetries. [3]
[1] Železný, J. et al., Phys. Rev. Lett. 113, 157201 (2014).
[2] Wadley, P. et al., Science 351,587 (2016).
[3] J. Godhino et. al, Nat. Com. 9, 4686 (2018)
Recently, there has been growing interest in the field of organic spintronics, where the research on organic semiconductors (OSCs) has extended from the complex aspects of charge carrier transport to the study of the spin transport properties of those anisotropic and partly localized systems.1 Furthermore, solution-processed OSCs are not only interesting due to their technological applications, but it has recently been shown in 6,13-bis(triisopropylsilylethynyl)-pentacene (TIPS-pentacene) thin film transistors that they can exhibit a negative temperature coefficient of the mobility due to localized transport limited by thermal lattice fluctuations.2 Here, spin injection and transport in solution-processed TIPS-pentacene are investigated exploiting vertical CoPt/TIPSpentacene/AlOx/Co spin valve architectures.3 The antiparallel magnetization state of the relative orientation of CoPt and Co is achieved due to their different coercive fields. A spin valve effect is detected from T = 175 K up to room temperature, where the resistance of the device is lower for the antiparallel magnetization state. The first observation of the scaling of the magnetoresistance (MR) with the bulk mobility of the OSC as a function of temperature, together with the dependence of the MR on the interlayer thickness, clearly indicates spin injection and transport in TIPS-pentacene. From OSC-spacer thickness-dependent MR measurements, a spin relaxation length of TIPS-pentacene of (24±6) nm and a spin relaxation time of approximately 3.5 μs at room temperature are estimated, taking the measured bulk mobility of holes into account.
Conference Committee Involvement (17)
Spintronics XVII
18 August 2024 | San Diego, California, United States
Spintronics XVI
20 August 2023 | San Diego, California, United States
Spintronics XV
21 August 2022 | San Diego, California, United States
Spintronics XIV
1 August 2021 | San Diego, California, United States
Spintronics XIII
24 August 2020 | Online Only, California, United States
Spintronics XII
11 August 2019 | San Diego, California, United States
Spintronics XI
19 August 2018 | San Diego, California, United States
Spintronics X
6 August 2017 | San Diego, California, United States
Spintronics IX
28 August 2016 | San Diego, California, United States
Spintronics VIII
9 August 2015 | San Diego, California, United States
Spintronics VII
17 August 2014 | San Diego, California, United States
Spintronics VI
25 August 2013 | San Diego, California, United States
Spintronics V
12 August 2012 | San Diego, California, United States
Spintronics IV
21 August 2011 | San Diego, California, United States
Spintronics III
1 August 2010 | San Diego, California, United States
Spintronics II
2 August 2009 | San Diego, California, United States
Spintronics
10 August 2008 | San Diego, California, United States
Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks.
You are receiving this notice because your organization may not have SPIE eBooks access.*
*Shibboleth/Open Athens users─please
sign in
to access your institution's subscriptions.
To obtain this item, you may purchase the complete book in print or electronic format on
SPIE.org.
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.