Exchange coupling torque in ferrimagnetic Co/Gd bilayer maximized near angular momentum compensation temperature

Bläsing, Robin; Ma, Tianping; Yang, See -Hun; Garg, Chirag; Dejene, Fasil Kidane; N’Diaye, Alpha T.; Chen, Gong; Liu, Kai; Parkin, Stuart S. P.

doi:10.1038/s41467-018-07373-w

Title: Exchange coupling torque in ferrimagnetic Co/Gd bilayer maximized near angular momentum compensation temperature

Journal Article · Mon Nov 26 00:00:00 EST 2018 · Nature Communications

DOI:https://doi.org/10.1038/s41467-018-07373-w· OSTI ID:1506384

Bläsing, Robin ^[1]; Ma, Tianping ^[1]; Yang, See -Hun ^[2]; Garg, Chirag ^[3]; Dejene, Fasil Kidane ^[4];

^[5]; Chen, Gong ^[6];

^[7];

^[1]

Max Planck Institute for Microstructure Physics, Halle (Saale) (Germany); Martin Luther Univ., Halle (Saale) (Germany)
IBM Research–Almaden, San Jose, CA (United States)
Max Planck Institute for Microstructure Physics, Halle (Saale) (Germany); Martin Luther Univ., Halle (Saale) (Germany); IBM Research–Almaden, San Jose, CA (United States)
Max Planck Institute for Microstructure Physics, Halle (Saale) (Germany); Loughborough Univ., Leicestershire (United Kingdom)
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
Univ. of California, Davis, CA (United States)
Univ. of California, Davis, CA (United States); Georgetown Univ., Washington, D.C. (United States)

Highly efficient current-induced motion of chiral domain walls was recently demonstrated in synthetic antiferromagnetic (SAF) structures due to an exchange coupling torque (ECT). The ECT derives from the antiferromagnetic exchange coupling through a ruthenium spacer layer between the two perpendicularly magnetized layers that comprise the SAF. Here we report that the same ECT mechanism applies to ferrimagnetic bi-layers formed from adjacent Co and Gd layers. In particular, we show that the ECT is maximized at the temperature T_A where the Co and Gd angular momenta balance each other, rather than at their magnetization compensation temperature T_M. The current induced velocity of the domain walls is highly sensitive to longitudinal magnetic fields but we show that this not the case near T_A. Our studies provide new insight into the ECT mechanism for ferrimagnetic systems. The high efficiency of the ECT makes it important for advanced domain wall based spintronic devices.

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Research Organization:: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)

Sponsoring Organization:: USDOE Office of Science (SC)

Grant/Contract Number:: AC02-05CH11231

OSTI ID:: 1506384

Journal Information:: Nature Communications, Vol. 9, Issue 1; ISSN 2041-1723

Publisher:: Nature Publishing GroupCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 63 works

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References (32)

Magnetic anisotropy in evaporated amorphous films of the ternary system Gd _x (Fe _{1− y} Co _y ) _{1− x} Taylor, R. C.; Gangulee, A. Journal of Applied Physics, Vol. 48, Issue 1 https://doi.org/10.1063/1.323387	journal	January 1977
Detailed analysis of the in situ magneto‐optic Kerr signal of gadolinium films near the Curie temperature Farle, M.; Lewis, W. A.; Baberschke, K. Applied Physics Letters, Vol. 62, Issue 21 https://doi.org/10.1063/1.109246	journal	May 1993
Anomalous Current-Induced Spin Torques in Ferrimagnets near Compensation Mishra, Rahul; Yu, Jiawei; Qiu, Xuepeng Physical Review Letters, Vol. 118, Issue 16 https://doi.org/10.1103/PhysRevLett.118.167201	journal	April 2017
Current-driven dynamics of chiral ferromagnetic domain walls Emori, Satoru; Bauer, Uwe; Ahn, Sung-Min Nature Materials, Vol. 12, Issue 7 https://doi.org/10.1038/nmat3675	journal	June 2013
Giant magnetoresistance in spin-valve multilayers Dieny, B. Journal of Magnetism and Magnetic Materials, Vol. 136, Issue 3 https://doi.org/10.1016/0304-8853(94)00356-4	journal	September 1994
Direct Observation of Domain Wall Motion Induced by Low-Current Density in TbFeCo Wires Ngo, Duc-The; Ikeda, Kotato; Awano, Hiroyuki Applied Physics Express, Vol. 4, Issue 9 https://doi.org/10.1143/APEX.4.093002	journal	August 2011
Chiral spin torque at magnetic domain walls Ryu, Kwang-Su; Thomas, Luc; Yang, See-Hun Nature Nanotechnology, Vol. 8, Issue 7 https://doi.org/10.1038/nnano.2013.102	journal	June 2013
Very large domain wall velocities in Pt/Co/GdOx and Pt/Co/Gd trilayers with Dzyaloshinskii-Moriya interaction Ha Pham, Thai; Vogel, J.; Sampaio, J. EPL (Europhysics Letters), Vol. 113, Issue 6 https://doi.org/10.1209/0295-5075/113/67001	journal	March 2016
Fast current-induced domain-wall motion controlled by the Rashba effect Miron, Ioan Mihai; Moore, Thomas; Szambolics, Helga Nature Materials, Vol. 10, Issue 6 https://doi.org/10.1038/nmat3020	journal	May 2011
Fast domain wall motion in the vicinity of the angular momentum compensation temperature of ferrimagnets Kim, Kab-Jin; Kim, Se Kwon; Hirata, Yuushou Nature Materials, Vol. 16, Issue 12 https://doi.org/10.1038/nmat4990	journal	September 2017
Spin-Orbit-Torque Efficiency in Compensated Ferrimagnetic Cobalt-Terbium Alloys Finley, Joseph; Liu, Luqiao Physical Review Applied, Vol. 6, Issue 5 https://doi.org/10.1103/PhysRevApplied.6.054001	journal	November 2016
Temperature Dependence of Current-Induced Magnetization Switching in Spin Valves with a Ferrimagnetic CoGd Free Layer Jiang, Xin; Gao, Li; Sun, Jonathan Z. Physical Review Letters, Vol. 97, Issue 21 https://doi.org/10.1103/PhysRevLett.97.217202	journal	November 2006
On the induced cobalt moments in (GdxY1−x)Co3 compounds Burzo, E.; Seitabla, D. Solid State Communications, Vol. 37, Issue 8 https://doi.org/10.1016/0038-1098(81)90544-5	journal	February 1981
Enhancement of spin Hall effect induced torques for current-driven magnetic domain wall motion: Inner interface effect Bang, Do; Yu, Jiawei; Qiu, Xuepeng Physical Review B, Vol. 93, Issue 17 https://doi.org/10.1103/PhysRevB.93.174424	journal	May 2016
Domain-wall velocities of up to 750 m s−1 driven by exchange-coupling torque in synthetic antiferromagnets Yang, See-Hun; Ryu, Kwang-Su; Parkin, Stuart Nature Nanotechnology, Vol. 10, Issue 3 https://doi.org/10.1038/nnano.2014.324	journal	February 2015
Intersublattice exchange coupling in Gd-Co compounds studied by INS Loewenhaupt, M.; Tils, P.; Buschow, K. H. J. Journal of Magnetism and Magnetic Materials, Vol. 138, Issue 1-2 https://doi.org/10.1016/0304-8853(94)90398-0	journal	November 1994
Temperature dependence of spin-orbit torques across the magnetic compensation point in a ferrimagnetic TbCo alloy film Ueda, Kohei; Mann, Maxwell; de Brouwer, Paul W. P. Physical Review B, Vol. 96, Issue 6 https://doi.org/10.1103/PhysRevB.96.064410	journal	August 2017
Indirect exchange for rare earths in metals Campbell, I. A. Journal of Physics F: Metal Physics, Vol. 2, Issue 3 https://doi.org/10.1088/0305-4608/2/3/004	journal	May 1972
Inverted and biased loops in amorphous Gd-Co films Lutes, O.; Holmen, J.; Kooyer, R. IEEE Transactions on Magnetics, Vol. 13, Issue 5 https://doi.org/10.1109/TMAG.1977.1059654	journal	September 1977
Magnetic Domain-Wall Racetrack Memory Parkin, S. S. P.; Hayashi, M.; Thomas, L. Science, Vol. 320, Issue 5873, p. 190-194 https://doi.org/10.1126/science.1145799	journal	April 2008
Anisotropic Superexchange Interaction and Weak Ferromagnetism Moriya, Tôru Physical Review, Vol. 120, Issue 1 https://doi.org/10.1103/PhysRev.120.91	journal	October 1960
Current-Induced Domain Wall Motion in a Compensated Ferrimagnet Siddiqui, Saima A.; Han, Jiahao; Finley, Joseph T. Physical Review Letters, Vol. 121, Issue 5 https://doi.org/10.1103/PhysRevLett.121.057701	journal	July 2018
Current-driven excitation of magnetic multilayers Slonczewski, J. C. Journal of Magnetism and Magnetic Materials, Vol. 159, Issue 1-2 https://doi.org/10.1016/0304-8853(96)00062-5	journal	June 1996
The effect of the spin-orbit interaction on the electronic structure of magnetic materials Min, B. I.; Jang, Y. -R Journal of Physics: Condensed Matter, Vol. 3, Issue 27 https://doi.org/10.1088/0953-8984/3/27/006	journal	July 1991
Amorphous metallic films for magneto‐optic applications Chaudhari, P.; Cuomo, J. J.; Gambino, R. J. Applied Physics Letters, Vol. 22, Issue 7 https://doi.org/10.1063/1.1654662	journal	April 1973
Novel domain wall dynamics in synthetic antiferromagnets Yang, See-Hun; Parkin, Stuart Journal of Physics: Condensed Matter, Vol. 29, Issue 30 https://doi.org/10.1088/1361-648X/aa752d	journal	June 2017
Current-driven dynamics of chiral ferromagnetic domain walls Emori, Satoru; Bauer, Uwe; Ahn, Sung-Min arXiv https://doi.org/10.48550/arxiv.1302.2257	text	January 2013
Anomalous current-induced spin torques in ferrimagnets near compensation Mishra, Rahul; Yu, Jiawei; Qiu, Xuepeng arXiv https://doi.org/10.48550/arxiv.1703.08263	text	January 2017
Modified Landau-Lifshitz equation for ferromagnetism Visintin, Augusto Physica B: Condensed Matter, Vol. 233, Issue 4 https://doi.org/10.1016/s0921-4526(97)00322-0	journal	June 1997
On the Gyromagnetic Ratio and Spectroscopic Splitting Factor of Ferromagnetic Substances Kittel, Charles Physical Review, Vol. 76, Issue 6 https://doi.org/10.1103/physrev.76.743	journal	September 1949
Very large domain wall velocities in Pt/Co/Gd trilayers with Dzyaloshinskii-Moriya interaction Pham, Thai Ha; Vogel, J.; Sampaio, J. arXiv https://doi.org/10.48550/arxiv.1602.04144	text	January 2016
Current-induced domain wall motion in compensated ferrimagnet Siddiqui, Saima A.; Han, Jiahao; Finley, Joseph T. arXiv https://doi.org/10.48550/arxiv.1806.01167	text	January 2018

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Magnetic reversal in rare-earth free Mn _{4 − x} Ni _x N epitaxial films below and above Ni composition needed for magnetic compensation around room temperature Komori, Taro; Hirose, Taku; Gushi, Toshiki Journal of Applied Physics, Vol. 127, Issue 4 https://doi.org/10.1063/1.5128635	journal	January 2020
Giant perpendicular magnetic anisotropy in Ir/Co/Pt multilayers Lau, Yong-Chang; Chi, Zhendong; Taniguchi, Tomohiro Physical Review Materials, Vol. 3, Issue 10 https://doi.org/10.1103/physrevmaterials.3.104419	journal	October 2019
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