A new reversal mode in exchange coupled antiferromagnetic/ferromagnetic disks: distorted viscous vortex

Gilbert, Dustin A.; Ye, Li; Varea, Aïda; Agramunt-Puig, Sebastià; del Valle, Nuria; Navau, Carles; López-Barbera, José Francisco; Buchanan, Kristen S.; Hoffmann, Axel; Sánchez, Alvar; Sort, Jordi; Liu, Kai; Nogués, Josep

doi:10.1039/c5nr01856k

Title: A new reversal mode in exchange coupled antiferromagnetic/ferromagnetic disks: distorted viscous vortex

Journal Article · Tue Apr 28 00:00:00 EDT 2015 · Nanoscale

DOI:https://doi.org/10.1039/c5nr01856k· OSTI ID:1214389

Gilbert, Dustin A. ^[1]; Ye, Li ^[1]; Varea, Aïda ^[2]; Agramunt-Puig, Sebastià ^[3]; del Valle, Nuria ^[3]; Navau, Carles ^[3]; López-Barbera, José Francisco ^[4]; Buchanan, Kristen S. ^[5]; Hoffmann, Axel ^[6]; Sánchez, Alvar ^[3]; Sort, Jordi ^[7]; Liu, Kai ^[1]; Nogués, Josep ^[8]

Univ. of California, Davis, CA (United States)
Universitat de Barcelona (Spain)
Univ. Autonoma de Barcelona, Bellaterra (Barcelona) (Spain)
Univ. Autonoma de Barcelona, Bellaterra (Barcelona) (Spain); ICN2 - Institut Catala de Nanociencia is Nanotechnologia, Bellaterra (Barcelona) (Spain)
Colorado State Univ., Fort Collins (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Univ. Autonoma de Barcelona, Bellaterra (Barcelona) (Spain); Institucio Catalana de Recerca i Estudis Avancats (ICREA), Barcelona (Spain)
Univ. Autonoma de Barcelona, Bellaterra (Barcelona) (Spain); ICN2 - Institut Catala de Nanociencia is Nanotechnologia, Bellaterra (Barcelona) (Spain); Institucio Catalana de Recerca i Estudis Avancats (ICREA), Barcelona (Spain)

Magnetic vortices have generated intense interest in recent years due to their unique reversal mechanisms, fascinating topological properties, and exciting potential applications. In addition, the exchange coupling of magnetic vortices to antiferromagnets has also been shown to lead to a range of novel phenomena and functionalities. Here we report a new magnetization reversal mode of magnetic vortices in exchange coupled Ir₂₀Mn₈₀/Fe₂₀Ni₈₀ microdots: distorted viscous vortex reversal. In contrast to the previously known or proposed reversal modes, the vortex is distorted close to the interface and viscously dragged due to the uncompensated spins of a thin antiferromagnet, which leads to unexpected asymmetries in the annihilation and nucleation fields. These results provide a deeper understanding of the physics of exchange coupled vortices and may also have important implications for applications involving exchange coupled nanostructures.

View Accepted Manuscript (DOE)

Cite

Export

Save

Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357; 2014-SGR-1015; ECCS-1232275; DMR-1008791; 11328402

OSTI ID:: 1214389

Alternate ID(s):: OSTI ID: 1352841

Journal Information:: Nanoscale, Vol. 7, Issue 21; ISSN 2040-3364

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

Citation Metrics:

Cited by: 17 works

Citation information provided by
Web of Science

References (62)

Asymmetric reversal of the hysteresis loop in exchange-biased nanodots Mejía-López, J.; Soto, P.; Altbir, D. Physical Review B, Vol. 71, Issue 10 https://doi.org/10.1103/PhysRevB.71.104422	journal	March 2005
Magnetization reversal of $Co ∕ Pt$ multilayers: Microscopic origin of high-field magnetic irreversibility Davies, Joseph E.; Hellwig, Olav; Fullerton, Eric E. Physical Review B, Vol. 70, Issue 22 https://doi.org/10.1103/PhysRevB.70.224434	journal	December 2004
Magnetization Reversal in Submicron Disks: Exchange Biased Vortices Sort, J.; Hoffmann, A.; Chung, S. -H. Physical Review Letters, Vol. 95, Issue 6 https://doi.org/10.1103/PhysRevLett.95.067201	journal	August 2005
Magnetic properties of L 1 ₀ -FePt/Fe exchange-coupled composite nanodots Huang, L. S.; Hu, J. F.; Zong, B. Y. Journal of Physics D: Applied Physics, Vol. 47, Issue 24 https://doi.org/10.1088/0022-3727/47/24/245001	journal	May 2014
Phase-locking of magnetic vortices mediated by antivortices Ruotolo, A.; Cros, V.; Georges, B. Nature Nanotechnology, Vol. 4, Issue 8 https://doi.org/10.1038/nnano.2009.143	journal	June 2009
Size-dependent magnetic properties of 100–500 nm diameter IrMn/NiFe disks made by a two-step deposition process Liu, F.; Ross, C. A. Journal of Applied Physics, Vol. 116, Issue 19 https://doi.org/10.1063/1.4902080	journal	November 2014
Exchange Bias Driven by Dzyaloshinskii-Moriya Interactions Yanes, R.; Jackson, J.; Udvardi, L. Physical Review Letters, Vol. 111, Issue 21 https://doi.org/10.1103/PhysRevLett.111.217202	journal	November 2013
Vortex Chirality in Exchange-Biased Elliptical Magnetic Rings Jung, W.; Castaño, F. J.; Ross, C. A. Physical Review Letters, Vol. 97, Issue 24 https://doi.org/10.1103/PhysRevLett.97.247209	journal	December 2006
Magnetic Biasing of a Ferroelectric Hysteresis Loop in a Multiferroic Orthoferrite Tokunaga, Y.; Taguchi, Y.; Arima, T. Physical Review Letters, Vol. 112, Issue 3 https://doi.org/10.1103/PhysRevLett.112.037203	journal	January 2014
Memory effect and triplet pairing generation in the superconducting exchange biased Co/CoO _x /Cu ₄₁ Ni ₅₉ /Nb/Cu ₄₁ Ni ₅₉ layered heterostructure Zdravkov, V. I.; Lenk, D.; Morari, R. Applied Physics Letters, Vol. 103, Issue 6 https://doi.org/10.1063/1.4818266	journal	August 2013
Direct observation of imprinted antiferromagnetic vortex states in CoO/Fe/Ag(001) discs Wu, J.; Carlton, D.; Park, J. S. Nature Physics, Vol. 7, Issue 4 https://doi.org/10.1038/nphys1891	journal	January 2011
Antiferromagnetic layer thickness dependence of the IrMn/Co exchange-bias system Ali, M.; Marrows, C. H.; Al-Jawad, M. Physical Review B, Vol. 68, Issue 21 https://doi.org/10.1103/PhysRevB.68.214420	journal	December 2003
Simulations of magnetic vortex dynamics in exchange-biased sub-micron-sized disks Parreiras, S. O.; Fior, G. B. M.; Garcia, F. Journal of Applied Physics, Vol. 114, Issue 20 https://doi.org/10.1063/1.4833568	journal	November 2013
Magnetic vortex oscillator driven by d.c. spin-polarized current Pribiag, V. S.; Krivorotov, I. N.; Fuchs, G. D. Nature Physics, Vol. 3, Issue 7 https://doi.org/10.1038/nphys619	journal	May 2007
Coercivity of ledge-type L10-FePt/Fe nanocomposites with perpendicular magnetization Goll, D.; Breitling, A. Applied Physics Letters, Vol. 94, Issue 5 https://doi.org/10.1063/1.3078286	journal	February 2009
Direct Observation of Internal Spin Structure of Magnetic Vortex Cores Wachowiak, A. Science, Vol. 298, Issue 5593 https://doi.org/10.1126/science.1075302	journal	October 2002
Asymmetric Reversal in Inhomogeneous Magnetic Heterostructures Li, Zhi-Pan; Petracic, Oleg; Morales, Rafael Physical Review Letters, Vol. 96, Issue 21 https://doi.org/10.1103/PhysRevLett.96.217205	journal	June 2006
Sign Control of Magnetoresistance Through Chemically Engineered Interfaces Ciudad, David; Gobbi, Marco; Kinane, Christy J. Advanced Materials, Vol. 26, Issue 45 https://doi.org/10.1002/adma.201401283	journal	October 2014
Deconvoluting reversal modes in exchange-biased nanodots Dumas, Randy K.; Li, Chang-Peng; Roshchin, Igor V. Physical Review B, Vol. 86, Issue 14 https://doi.org/10.1103/PhysRevB.86.144410	journal	October 2012
Abrupt Transition from Ferromagnetic to Antiferromagnetic of Interfacial Exchange in Perpendicularly Magnetized $L 1_{0}$ -MnGa/FeCo Tuned by Fermi Level Position Ma, Q. L.; Mizukami, S.; Kubota, T. Physical Review Letters, Vol. 112, Issue 15 https://doi.org/10.1103/PhysRevLett.112.157202	journal	April 2014
Electrical switching of the vortex core in a magnetic disk Yamada, Keisuke; Kasai, Shinya; Nakatani, Yoshinobu Nature Materials, Vol. 6, Issue 4 https://doi.org/10.1038/nmat1867	journal	March 2007
Exchange-Biased Magnetic Vortices Hoffmann, A.; Sort, J.; Buchanan, K. S. IEEE Transactions on Magnetics, Vol. 44, Issue 7 https://doi.org/10.1109/TMAG.2008.924547	journal	July 2008
Chirality control via double vortices in asymmetric Co dots Dumas, Randy K.; Gilbert, Dustin A.; Eibagi, Nasim Physical Review B, Vol. 83, Issue 6 https://doi.org/10.1103/PhysRevB.83.060415	journal	February 2011
Correlation between Exchange Bias and Pinned Interfacial Spins Ohldag, H.; Scholl, A.; Nolting, F. Physical Review Letters, Vol. 91, Issue 1 https://doi.org/10.1103/PhysRevLett.91.017203	journal	July 2003
Micromagnetic modeling of spin-wave dynamics in exchange-biased permalloy disks Heinonen, O. G.; Schreiber, D. K.; Petford-Long, A. K. Physical Review B, Vol. 76, Issue 14 https://doi.org/10.1103/PhysRevB.76.144407	journal	October 2007
Mechanisms for exchange bias Stamps, R. L. Journal of Physics D: Applied Physics, Vol. 33, Issue 23 https://doi.org/10.1088/0022-3727/33/23/201	journal	November 2000
Temperature induced single domain–vortex state transition in sub-100nm Fe nanodots Dumas, Randy K.; Liu, Kai; Li, Chang-Peng Applied Physics Letters, Vol. 91, Issue 20 https://doi.org/10.1063/1.2807276	journal	November 2007
Electric Control of Exchange Bias Training Echtenkamp, W.; Binek, Ch. Physical Review Letters, Vol. 111, Issue 18 https://doi.org/10.1103/PhysRevLett.111.187204	journal	October 2013
Magnetic Vortex Core Observation in Circular Dots of Permalloy Shinjo, T. Science, Vol. 289, Issue 5481 https://doi.org/10.1126/science.289.5481.930	journal	August 2000
Uncompensated Moments in the $MnPd / Fe$ Exchange Bias System Brück, Sebastian; Schütz, Gisela; Goering, Eberhard Physical Review Letters, Vol. 101, Issue 12 https://doi.org/10.1103/PhysRevLett.101.126402	journal	September 2008
Ordered magnetic nanostructures: fabrication and properties Martı́n, J. I.; Nogués, J.; Liu, Kai Journal of Magnetism and Magnetic Materials, Vol. 256, Issue 1-3 https://doi.org/10.1016/S0304-8853(02)00898-3	journal	January 2003
Controlling magnetic vortices through exchange bias Sort, J.; Salazar-Alvarez, G.; Baró, M. D. Applied Physics Letters, Vol. 88, Issue 4 https://doi.org/10.1063/1.2165290	journal	January 2006
Pinned magnetization in the antiferromagnet and ferromagnet of an exchange bias system Fitzsimmons, M. R.; Kirby, B. J.; Roy, S. Physical Review B, Vol. 75, Issue 21 https://doi.org/10.1103/PhysRevB.75.214412	journal	June 2007
Control of the chirality and polarity of magnetic vortices in triangular nanodots Jaafar, M.; Yanes, R.; Perez de Lara, D. Physical Review B, Vol. 81, Issue 5 https://doi.org/10.1103/PhysRevB.81.054439	journal	February 2010
Direct evidence of imprinted vortex states in the antiferromagnet of exchange biased microdisks Salazar-Alvarez, G.; Kavich, J. J.; Sort, J. Applied Physics Letters, Vol. 95, Issue 1 https://doi.org/10.1063/1.3168515	journal	July 2009
Controlling vortex chirality and polarity by geometry in magnetic nanodots Agramunt-Puig, Sebastia; Del-Valle, Nuria; Navau, Carles Applied Physics Letters, Vol. 104, Issue 1 https://doi.org/10.1063/1.4861423	journal	January 2014
Temperature dependent magnetization reversal of exchange biased magnetic vortices in IrMn/Fe microcaps Thomas, S.; Nissen, D.; Albrecht, M. Applied Physics Letters, Vol. 105, Issue 2 https://doi.org/10.1063/1.4890380	journal	July 2014
Oscillatory dependence of current-driven magnetic domain wall motion on current pulse length Thomas, Luc; Hayashi, Masamitsu; Jiang, Xin Nature, Vol. 443, Issue 7108 https://doi.org/10.1038/nature05093	journal	September 2006
Single-Domain Circular Nanomagnets Cowburn, R. P.; Koltsov, D. K.; Adeyeye, A. O. Physical Review Letters, Vol. 83, Issue 5 https://doi.org/10.1103/PhysRevLett.83.1042	journal	August 1999
Magnetic vortex core reversal by excitation of spin waves Kammerer, Matthias; Weigand, Markus; Curcic, Michael Nature Communications, Vol. 2, Issue 1 https://doi.org/10.1038/ncomms1277	journal	April 2011
Creating an Artificial Two-Dimensional Skyrmion Crystal by Nanopatterning Sun, L.; Cao, R. X.; Miao, B. F. Physical Review Letters, Vol. 110, Issue 16 https://doi.org/10.1103/PhysRevLett.110.167201	journal	April 2013
Reversal behavior of exchange-biased submicron dots Li, Zhi-Pan; Petracic, Oleg; Eisenmenger, Johannes Applied Physics Letters, Vol. 86, Issue 7 https://doi.org/10.1063/1.1863449	journal	January 2005
Quantitative Decoding of Interactions in Tunable Nanomagnet Arrays Using First Order Reversal Curves Gilbert, Dustin A.; Zimanyi, Gergely T.; Dumas, Randy K. Scientific Reports, Vol. 4, Issue 1 https://doi.org/10.1038/srep04204	journal	February 2014
Biofunctionalized magnetic-vortex microdiscs for targeted cancer-cell destruction Kim, Dong-Hyun; Rozhkova, Elena A.; Ulasov, Ilya V. Nature Materials, Vol. 9, Issue 2 https://doi.org/10.1038/nmat2591	journal	November 2009
Control of quantum magnets by atomic exchange bias Yan, Shichao; Choi, Deung-Jang; Burgess, Jacob A. J. Nature Nanotechnology, Vol. 10, Issue 1 https://doi.org/10.1038/nnano.2014.281	journal	December 2014
Anisotropy dependence of irreversible switching in Fe∕SmCo and FeNi∕FePt exchange spring magnet films Davies, Joseph E.; Hellwig, Olav; Fullerton, Eric E. Applied Physics Letters, Vol. 86, Issue 26 https://doi.org/10.1063/1.1954898	journal	June 2005
Exchange bias in nanostructures Nogués, J.; Sort, J.; Langlais, V. Physics Reports, Vol. 422, Issue 3 https://doi.org/10.1016/j.physrep.2005.08.004	journal	December 2005
Anisotropic magnetoresistance in an antiferromagnetic semiconductor Fina, I.; Marti, X.; Yi, D. Nature Communications, Vol. 5, Issue 1 https://doi.org/10.1038/ncomms5671	journal	September 2014
Field dependent exchange coupling in NiO/Co bilayers Camarero, J.; Pennec, Y.; Vogel, J. Physical Review B, Vol. 67, Issue 2 https://doi.org/10.1103/PhysRevB.67.020413	journal	January 2003
Magnetization reversal in circularly exchange-biased ferromagnetic disks Tanase, M.; Petford-Long, A. K.; Heinonen, O. Physical Review B, Vol. 79, Issue 1 https://doi.org/10.1103/PhysRevB.79.014436	journal	January 2009
Magnetic fingerprints of sub- $100 nm$ Fe dots Dumas, Randy K.; Li, Chang-Peng; Roshchin, Igor V. Physical Review B, Vol. 75, Issue 13 https://doi.org/10.1103/PhysRevB.75.134405	journal	April 2007
Vortex magnetization reversal in double-layer ferromagnetic/antiferromagnetic dots Guslienko, K. Y.; Hoffmann, A. Journal of Applied Physics, Vol. 101, Issue 9 https://doi.org/10.1063/1.2719620	journal	May 2007
Translational-mode dynamics of exchange-biased vortices Buchanan, K. S.; Hoffmann, A.; Novosad, V. Journal of Applied Physics, Vol. 103, Issue 7 https://doi.org/10.1063/1.2830643	journal	April 2008
Exchange bias Nogués, J.; Schuller, Ivan K. Journal of Magnetism and Magnetic Materials, Vol. 192, Issue 2 https://doi.org/10.1016/S0304-8853(98)00266-2	journal	February 1999
Probing the A 1 to L 1 ₀ transformation in FeCuPt using the first order reversal curve method Gilbert, Dustin A.; Liao, Jung-Wei; Wang, Liang-Wei APL Materials, Vol. 2, Issue 8 https://doi.org/10.1063/1.4894197	journal	August 2014
Vortex Nucleation in Exchange Biased Magnetic Nanoelements Dantas, Ana L.; Reboucas, G. O. G.; Carrico, A. S. IEEE Transactions on Magnetics, Vol. 46, Issue 6 https://doi.org/10.1109/TMAG.2010.2040254	journal	June 2010
Effect of anisotropy on the critical antiferromagnet thickness in exchange-biased bilayers Lund, M. S.; Macedo, W. A. A.; Liu, Kai Physical Review B, Vol. 66, Issue 5 https://doi.org/10.1103/PhysRevB.66.054422	journal	August 2002
Chirality Switching and Winding or Unwinding of the Antiferromagnetic NiO Domain Walls in $Fe / NiO / Fe / CoO / Ag (001)$ Li, J.; Tan, A.; Ma, S. Physical Review Letters, Vol. 113, Issue 14 https://doi.org/10.1103/PhysRevLett.113.147207	journal	October 2014
First-order reversal curve diagram analysis of a perpendicular nickel nanopillar array Pike, C. R.; Ross, C. A.; Scalettar, R. T. Physical Review B, Vol. 71, Issue 13 https://doi.org/10.1103/PhysRevB.71.134407	journal	April 2005
Field Evolution of Tilted Vortex Cores in Exchange-Biased Ferromagnetic Dots Guslienko, Konstantin Yu.; Hoffmann, Axel Physical Review Letters, Vol. 97, Issue 10 https://doi.org/10.1103/PhysRevLett.97.107203	journal	September 2006
Simultaneous in-plane and out-of-plane exchange bias using a single antiferromagnetic layer resolved by x-ray magnetic circular dichroism Nogués, J.; Stepanow, S.; Bollero, A. Applied Physics Letters, Vol. 95, Issue 15 https://doi.org/10.1063/1.3232213	journal	October 2009
Magnetic Vortex State Stability, Reversal and Dynamics in Restricted Geometries Guslienko, K. Yu. Journal of Nanoscience and Nanotechnology, Vol. 8, Issue 6 https://doi.org/10.1166/jnn.2008.003	journal	June 2008

Cited By (2)

Magnetic bilayer-skyrmions without skyrmion Hall effect Zhang, Xichao; Zhou, Yan; Ezawa, Motohiko Nature Communications, Vol. 7, Issue 1 https://doi.org/10.1038/ncomms10293	journal	January 2016
Magnetic bilayer-skyrmions without skyrmion Hall effect Zhang, Xichao; Zhou, Yan; Ezawa, Motohiko arXiv https://doi.org/10.48550/arxiv.1504.02252	text	January 2015

Similar Records

Observation of magnetic adatom-induced Majorana vortex and its hybridization with field-induced Majorana vortex in an iron-based superconductor

Journal Article · Mon Mar 01 00:00:00 EST 2021 · Nature Communications · OSTI ID:1214389

Fan, Peng; Yang, Fazhi; Qian, Guojian; +16 more

Magnetic order and interfacial coupling in oxide thin films and heterostructures probed with soft x-ray dichroism

Conference · Sun Feb 01 00:00:00 EST 2009 · OSTI ID:1214389

Arenholz, Elke; van der Laan, G

Direct observation of imprinted antiferromagnetic vortex state in CoO/Fe/Ag(001) disks

Journal Article · Tue Dec 21 00:00:00 EST 2010 · Nature Physics · OSTI ID:1214389

Wu, J; Carlton, D; Park, J S; +9 more

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
77 NANOSCIENCE AND NANOTECHNOLOGY
36 MATERIALS SCIENCE

Title: A new reversal mode in exchange coupled antiferromagnetic/ferromagnetic disks: distorted viscous vortex

Citation Formats

References (62)

Cited By (2)

Similar Records

Related Subjects