Antiferromagnetic interlayer exchange coupled Co
Journal
Scientific reports
ISSN: 2045-2322
Titre abrégé: Sci Rep
Pays: England
ID NLM: 101563288
Informations de publication
Date de publication:
02 Jan 2024
02 Jan 2024
Historique:
received:
21
06
2023
accepted:
14
12
2023
medline:
4
1
2024
pubmed:
4
1
2024
entrez:
3
1
2024
Statut:
epublish
Résumé
Synthetic antiferromagnetic structures can exhibit the advantages of high velocity similarly to antiferromagnets with the additional benefit of being imaged and read-out through techniques applied to ferromagnets. Here, we explore the potential and limits of synthetic antiferromagnets to uncover ways to harness their valuable properties for applications. Two synthetic antiferromagnetic systems have been engineered and systematically investigated to provide an informed basis for creating devices with maximum potential for data storage, logic devices, and skyrmion racetrack memories. The two systems considered are (system 1) CoB/Ir/Pt of N repetitions with Ir inducing the negative coupling between the ferromagnetic layers and (system 2) two ferromagnetically coupled multilayers of CoB/Ir/Pt, coupled together antiferromagnetically with an Ir layer. From the hysteresis, it is found that system 1 shows stable antiferromagnetic interlayer exchange coupling between each magnetic layer up to N = 7. Using Kerr imaging, the two ferromagnetic multilayers in system 2 are shown to undergo separate maze-like switches during hysteresis. Both systems are also studied as a function of temperature and show different behaviors. Micromagnetic simulations predict that in both systems the skyrmion Hall angle is suppressed with the skyrmion velocity five times higher in system 1 than system 2.
Identifiants
pubmed: 38168577
doi: 10.1038/s41598-023-49976-4
pii: 10.1038/s41598-023-49976-4
doi:
Types de publication
Journal Article
Langues
eng
Sous-ensembles de citation
IM
Pagination
95Subventions
Organisme : European Metrology Programme for Innovation and Research
ID : 17FUN08-TOPS
Organisme : European Metrology Programme for Innovation and Research
ID : 17FUN08-TOPS
Organisme : European Metrology Programme for Innovation and Research
ID : 17FUN08-TOPS
Organisme : European Metrology Programme for Innovation and Research
ID : 17FUN08-TOPS
Organisme : Henry Royce Institute
ID : EP/R00661X/1
Organisme : Henry Royce Institute
ID : EP/R00661X/1
Organisme : Henry Royce Institute
ID : EP/R00661X/1
Organisme : Henry Royce Institute
ID : EP/R00661X/1
Organisme : Ministero dell'Università e della Ricerca
ID : PRIN 2020LWPKH7
Organisme : Ministero dell'Università e della Ricerca
ID : PRIN 2020LWPKH7
Organisme : Ministero dell'Università e della Ricerca
ID : PRIN 2020LWPKH7
Organisme : HORIZON EUROPE Framework Programme
ID : 101070287
Organisme : HORIZON EUROPE Framework Programme
ID : 101070287
Organisme : HORIZON EUROPE Framework Programme
ID : 101070287
Informations de copyright
© 2024. The Author(s).
Références
Duine, R. A., Lee, K.-J., Parkin, S. S. P. & Stiles, M. D. Synthetic antiferromagnetic spintronics. Nat. Phys. 14, 217–219 (2018).
pubmed: 29910827
pmcid: 5997292
doi: 10.1038/s41567-018-0050-y
Grünberg, P., Schreiber, R., Pang, Y., Brodsky, M. B. & Sowers, H. Layered magnetic structures: Evidence for antiferromagnetic coupling of Fe layers across Cr interlayers. Phys. Rev. Lett. 57, 2442–2445 (1986).
pubmed: 10033726
doi: 10.1103/PhysRevLett.57.2442
Baibich, M. N. et al. Giant magnetoresistance of (001)Fe/(001)Cr magnetic superlattices. Phys. Rev. Lett. 61, 2472–2475 (1988).
pubmed: 10039127
doi: 10.1103/PhysRevLett.61.2472
Bruno, P. Theory of interlayer magnetic coupling. Phys. Rev. B 52, 411–439 (1995).
doi: 10.1103/PhysRevB.52.411
Ruderman, M. A. & Kittel, C. Indirect exchange coupling of nuclear magnetic moments by conduction electrons. Phys. Rev. 96, 99–102 (1954).
doi: 10.1103/PhysRev.96.99
Kasuya, T. A theory of metallic ferro- and antiferromagnetism on Zener’s model. Prog. Theor. Phys. 16, 45–57 (1956).
doi: 10.1143/PTP.16.45
Yosida, K. Magnetic properties of Cu–Mn alloys. Phys. Rev. 106, 893–898 (1957).
doi: 10.1103/PhysRev.106.893
Parkin, S. S. P. Systematic variation of the strength and oscillation period of indirect magnetic exchange coupling through the 3 d, 4 d, and 5 d transition metals. Phys. Rev. Lett. 67, 3598–3601 (1991).
pubmed: 10044776
doi: 10.1103/PhysRevLett.67.3598
Bandiera, S. et al. Comparison of synthetic antiferromagnets and hard ferromagnets as reference layer in magnetic tunnel junctions with perpendicular magnetic anisotropy. IEEE Magn. Lett. 1, 3000204–3000204 (2010).
doi: 10.1109/LMAG.2010.2052238
Bergman, A. et al. Ultrafast switching in a synthetic antiferromagnetic magnetic random-access memory device. Phys. Rev. B 83, 224429 (2011).
doi: 10.1103/PhysRevB.83.224429
Lee, S.-W. & Lee, K. Current-induced magnetization switching of synthetic antiferromagnetic free layer in magnetic tunnel junctions. J. Appl. Phys. 109, 07C904 (2011).
doi: 10.1063/1.3562214
Yang, S. H., Ryu, K. S. & Parkin, S. Domain-wall velocities of up to 750 m s
pubmed: 25705867
doi: 10.1038/nnano.2014.324
Parkin, S. & Yang, S. H. Memory on the racetrack. Nat. Nanotechnol. 10, 195–198 (2015).
pubmed: 25740128
doi: 10.1038/nnano.2015.41
Kechrakos, D. et al. Skyrmions in nanorings: A versatile platform for skyrmionics. Phys. Rev. Appl. 20, 044039 (2023). https://doi.org/10.1103/PhysRevApplied.20.044039
doi: 10.1103/PhysRevApplied.20.044039
He, B. et al. All-electrical 9-bit skyrmion-based racetrack memory designed with laser irradiation. Nano. Lett. 23(20), 9482–9490. (2023). https://doi.org/10.1021/acs.nanolett.3c02978
doi: 10.1021/acs.nanolett.3c02978
pubmed: 37818857
Zhang, X., Zhou, Y. & Ezawa, M. Magnetic bilayer-skyrmions without skyrmion Hall effect. Nat. Commun. 7, 10293 (2016).
pubmed: 26782905
pmcid: 4735649
doi: 10.1038/ncomms10293
Zhang, X., Zhou, Y. & Ezawa, M. Antiferromagnetic skyrmion: Stability, creation and manipulation. Sci. Rep. 6, 24795 (2016).
pubmed: 27099125
pmcid: 4838875
doi: 10.1038/srep24795
Barker, J. & Tretiakov, O. A. Static and dynamical properties of antiferromagnetic skyrmions in the presence of applied current and temperature. Phys. Rev. Lett. 116, 147203 (2016).
pubmed: 27104724
doi: 10.1103/PhysRevLett.116.147203
Jin, C., Song, C., Wang, J. & Liu, Q. Dynamics of antiferromagnetic skyrmion driven by the spin Hall effect. Appl. Phys. Lett. 109, 182404 (2016).
doi: 10.1063/1.4967006
Tomasello, R. et al. Performance of synthetic antiferromagnetic racetrack memory: Domain wall versus skyrmion. J. Phys. D Appl. Phys. 50, 325302 (2017).
doi: 10.1088/1361-6463/aa7a98
Legrand, W. et al. Room-temperature stabilization of antiferromagnetic skyrmions in synthetic antiferromagnets. Nat. Mater. 19, 34–42 (2020).
pubmed: 31477905
doi: 10.1038/s41563-019-0468-3
Juge, R. et al. Skyrmions in synthetic antiferromagnets and their nucleation via electrical current and ultra-fast laser illumination. Nat. Commun. 13, 4807 (2022).
pubmed: 35974009
pmcid: 9381802
doi: 10.1038/s41467-022-32525-4
Chen, R. et al. Realization of isolated and high-density skyrmions at room temperature in uncompensated synthetic antiferromagnets. Nano Lett. 20, 3299–3305 (2020).
pubmed: 32282217
doi: 10.1021/acs.nanolett.0c00116
Dohi, T., DuttaGupta, S., Fukami, S. & Ohno, H. Formation and current-induced motion of synthetic antiferromagnetic skyrmion bubbles. Nat. Commun. 10, 5153 (2019).
pubmed: 31727895
pmcid: 6856122
doi: 10.1038/s41467-019-13182-6
Jiang, B. et al. Towards terahertz spin Hall nano-oscillator with synthesized anti-ferromagnets. J. Magn. Magn. Mater. 490, 165470 (2019).
doi: 10.1016/j.jmmm.2019.165470
Chen, X., Zheng, C., Zhou, S., Liu, Y. & Zhang, Z. Ferromagnetic resonance modes of a synthetic antiferromagnet at low magnetic fields. J. Phys. Condens. Matter 34, 015802 (2022).
doi: 10.1088/1361-648X/ac2a79
Waring, H. J., Johansson, N. A. B., Vera-Marun, I. J. & Thomson, T. Zero-field optic mode beyond 20 GHz in a synthetic antiferromagnet. Phys. Rev. Appl. 13, 034035 (2020).
doi: 10.1103/PhysRevApplied.13.034035
Zhong, H. et al. Terahertz spin-transfer torque oscillator based on a synthetic antiferromagnet. J. Magn. Magn. Mater. 497, 166070 (2020).
doi: 10.1016/j.jmmm.2019.166070
Park, H.-G., Yun, D. H., Jeong, W. M., Lee, O. & Min, B.-C. Interlayer exchange coupling with Ir/(Ru, Mo, or W)/Ir composite spacers in perpendicular synthetic antiferromagnets. J. Korean Phys. Soc. 79, 401–406 (2021).
doi: 10.1007/s40042-021-00251-7
Karayev, S. et al. Interlayer exchange coupling in Pt/Co/Ru and Pt/Co/Ir superlattices. Phys. Rev. Mater. 3, 3–9 (2019).
Ishikuro, Y., Kawaguchi, M., Taniguchi, T. & Hayashi, M. Highly efficient spin-orbit torque in Pt/Co/Ir multilayers with antiferromagnetic interlayer exchange coupling. Phys. Rev. B 101, 014404 (2020).
doi: 10.1103/PhysRevB.101.014404
Gabor, M. S. et al. Interlayer exchange coupling in perpendicularly magnetized Pt/Co/Ir/Co/Pt structures. J. Phys. D Appl. Phys. 50, 465004 (2017).
doi: 10.1088/1361-6463/aa8ece
Lau, Y.-C. et al. Giant perpendicular magnetic anisotropy in Ir/Co/Pt multilayers. Phys. Rev. Mater. 3, 104419 (2019).
doi: 10.1103/PhysRevMaterials.3.104419
Morgunov, R. B. et al. Oscillatory dynamics of the magnetic moment of a Pt/Co/Ir/Co/Pt synthetic antiferromagnet. Phys. Rev. B 100, 144407 (2019).
doi: 10.1103/PhysRevB.100.144407
Schwieger, S. & Nolting, W. Origin of the temperature dependence of interlayer exchange coupling in metallic trilayers. Phys. Rev. B 69, 224413 (2004).
doi: 10.1103/PhysRevB.69.224413
Wiese, N. et al. Strong temperature dependence of antiferromagnetic coupling in CoFeB/Ru/CoFeB. Europhys. Lett. 78, 67002 (2007).
doi: 10.1209/0295-5075/78/67002
Kalarickal, S. S., Xu, X. Y., Lenz, K., Kuch, W. & Baberschke, K. Dominant role of thermal magnon excitation in temperature dependence of interlayer exchange coupling: Experimental verification. Phys. Rev. B 75, 224429 (2007).
doi: 10.1103/PhysRevB.75.224429
Almeida, B. G., Amaral, V. S., Sousa, J. B., Colino, J. & Schuller, I. K. Temperature dependence of the magnetic interlayer coupling in Fe/Cr multilayers. J. Magn. Magn. Mater. 177–181, 1170–1172 (1998).
doi: 10.1016/S0304-8853(97)00621-5
Zhang, Z., Zhou, L., Wigen, P. E. & Ounadjela, K. Using ferromagnetic resonance as a sensitive method to study temperature dependence of interlayer exchange coupling. Phys. Rev. Lett. 73, 336–339 (1994).
pubmed: 10057144
doi: 10.1103/PhysRevLett.73.336
Celinski, Z. et al. Growth and magnetic studies of lattice expanded Pd in ultrathin Fe(001)/Pd(001) t/Fe(001) structures. Phys. Rev. Lett. 65, 1156–1159 (1990).
pubmed: 10043119
doi: 10.1103/PhysRevLett.65.1156
Lavrijsen, R. et al. Reduced domain wall pinning in ultrathin Pt/Co
doi: 10.1063/1.3280373
Cocke, D. L., Liang, G., Owens, M., Halverson, D. E. & Naugle, D. G. The oxidation behavior of amorphous and polycrystalline ZrNi alloys. Mater. Sci. Eng. 99, 497–500 (1988).
doi: 10.1016/0025-5416(88)90384-9
Moreau-Luchaire, C. et al. Additive interfacial chiral interaction in multilayers for stabilization of small individual skyrmions at room temperature. Nat. Nanotechnol. 11, 444–448 (2016).
pubmed: 26780660
doi: 10.1038/nnano.2015.313
Yakushiji, K., Sugihara, A., Fukushima, A., Kubota, H. & Yuasa, S. Very strong antiferromagnetic interlayer exchange coupling with iridium spacer layer for perpendicular magnetic tunnel junctions. Appl. Phys. Lett. 110, 092406 (2017).
doi: 10.1063/1.4977565
Pandey, N., Li, M., De Graef, M. & Sokalski, V. Stabilization of coupled Dzyaloshinskii domain walls in fully compensated synthetic anti-ferromagnets. AIP Adv. 10, 015233 (2020).
doi: 10.1063/1.5130411
Fukushima, A. et al. Giant magnetoresistance in perpendicularly magnetized synthetic antiferromagnetic coupling with Ir spacer. AIP Adv. 8, 055925 (2018).
doi: 10.1063/1.5007304
Liu, H. et al. Manipulation of magnetization switching and tunnel magnetoresistance via temperature and voltage control. Sci. Rep. 5, 1–8 (2015).
doi: 10.1038/srep18269
Björck, M. & Andersson, G. GenX: An extensible X-ray reflectivity refinement program utilizing differential evolution. J. Appl. Crystallogr. 40, 1174–1178 (2007).
doi: 10.1107/S0021889807045086
Kools, J. C. S., Rijks, T. G. S. M., De Veirman, A. E. M. & Coehoorn, R. On the ferromagnetic interlayer coupling in exchange-biased spin-valve multilayers. IEEE Trans. Magn. 31, 3918–3920 (1995).
doi: 10.1109/20.489816
Moritz, J., Garcia, F., Toussaint, J. C., Dieny, B. & Nozières, J. P. Orange peel coupling in multilayers with perpendicular magnetic anisotropy: Application to (Co/Pt)-based exchange-biased spin-valves. Europhys. Lett. 65, 123–129 (2004).
doi: 10.1209/epl/i2003-10063-9
Matczak, M. et al. Antiferromagnetic magnetostatic coupling in Co/Au/Co films with perpendicular anisotropy. J. Appl. Phys. 114, 093911 (2013).
doi: 10.1063/1.4819380
Bloemen, P. J. H., van Kesteren, H. W., Swagten, H. J. M. & de Jonge, W. J. M. Oscillatory interlayer exchange coupling in Co/Ru multilayers and bilayers. Phys. Rev. B 50, 13505 (1994).
doi: 10.1103/PhysRevB.50.13505
Bruno, P. & Chappert, C. Oscillatory coupling between ferromagnetic layers separated by a nonmagnetic metal spacer. Phys. Rev. Lett. 67, 1602–1605 (1991).
pubmed: 10044197
doi: 10.1103/PhysRevLett.67.1602
Salimath, A., Zhuo, F., Tomasello, R., Finocchio, G. & Manchon, A. Controlling the deformation of antiferromagnetic skyrmions in the high-velocity regime. Phys. Rev. B 101, 24429 (2020).
doi: 10.1103/PhysRevB.101.024429
Grollier, J. et al. Neuromorphic spintronics. Nat. Electron. 3, 360–370 (2020).
doi: 10.1038/s41928-019-0360-9
Finocchio, G. et al. The promise of spintronics for unconventional computing. J. Magn. Magn. Mater. 521, 167506 (2021).
doi: 10.1016/j.jmmm.2020.167506
Dohi, T. et al. Enhanced thermally-activated skyrmion diffusion with tunable effective gyrotropic force. Nat. Commun. 14, 5424 (2023).
pubmed: 37696785
pmcid: 10495465
doi: 10.1038/s41467-023-40720-0
Bourianoff, G., Pinna, D., Sitte, M. & Everschor-Sitte, K. Potential implementation of reservoir computing models based on magnetic skyrmions. AIP Adv. 8, 055602 (2018).
doi: 10.1063/1.5006918
Pinna, D., Bourianoff, G. & Everschor-Sitte, K. Reservoir computing with random skyrmion textures. Phys. Rev. Appl. 14, 054020 (2020).
doi: 10.1103/PhysRevApplied.14.054020
Lee, O. et al. Task-adaptive physical reservoir computing. Nat. Mater. https://doi.org/10.1038/s41563-023-01698-8 (2023).
doi: 10.1038/s41563-023-01698-8
pubmed: 38012388
Rodrigues, D. R., Raimondo, E., Puliafito, V., Moukhadder, R., Azzerboni, B., Hamadeh, A., Pirro, R., Carpentieri, M. & Finocchio, G. Dynamical neural network based on spin transfer nano-oscillators. in IEEE Transactions on Nanotechnology, Vol. 22. 800-805 (2023). https://doi.org/10.1109/TNANO.2023.3330535 .
doi: 10.1109/TNANO.2023.3330535
Giordano, A., Finocchio, G., Torres, L., Carpentieri, M. & Azzerboni, B. Semi-implicit integration scheme for Landau–Lifshitz–Gilbert–Slonczewski equation. J. Appl. Phys. 111, 07D112 (2012).
doi: 10.1063/1.3673428
Lopez-Diaz, L. et al. Micromagnetic simulations using graphics processing units. J. Phys. D Appl. Phys. 45, 323001 (2012).
doi: 10.1088/0022-3727/45/32/323001
Li, W. et al. Anatomy of skyrmionic textures in magnetic multilayers. Adv. Mater. 31, 1807683 (2019).
doi: 10.1002/adma.201807683
Tomasello, R. et al. Micromagnetic understanding of the skyrmion Hall angle current dependence in perpendicularly magnetized ferromagnets. Phys. Rev. B 98, 224418 (2018).
doi: 10.1103/PhysRevB.98.224418
Ishikuro, Y., Kawaguchi, M., Kato, N., Lau, Y. C. & Hayashi, M. Dzyaloshinskii–Moriya interaction and spin–orbit torque at the Ir/Co interface. Phys. Rev. B 99, 134421 (2019).
doi: 10.1103/PhysRevB.99.134421