Dr. Ciarán Fowley, FWIN-S, Spintronics

Projects:

TRANSPIRE - Terahertz Radio communication using high ANistropy SPIn torque REsonators - co-author - EU-H2020-RIA FET-Open May 2016. Total Budget EUR 4.4M.

DEPNA - Development and Exploitation of Programmable Nanomagnet Arrays - no-cost partner - LabEX NIE (France) October 2016. Total Budget EUR 120k.

Q-Nano Transnational Access Award, TCD-TAF-019, June 2012 - "Modification and characterisation of Co/Pt multi-layers using a focused helium ion beam" - Travel and machine time grant. Approx EUR 7k.

HZDR Publications:

"Spin torque switching in nanopillars with antiferromagnetic reference layer", M Arora, C Fowley, T Mckinnon, E Kowalska, V Sluka, AM Deac, B Heinrich, E Girt, IEEE Magnetics Letters, available online (2016).

“Narrow-band tunable terahertz emission from ferrimagnetic Mn3-xGa thin films”, N Awari, S Kovalev, C Fowley, K Rode, RA Gallardo, YC Lau, D Betto, N Thiyagarajah, B Green, O Yildirim, J Lindner, J Fassbender,JMD Coey, AM Deac, M Gensch, Applied Physics Letters, 109, 032403 (2016).

“Evolution of the interfacial magnetic anisotropy in MgO/CoFeB/Ta/Ru based multilayers as a function of annealing temperature”, Y Aleksandrov, C Fowley, E Kowalska, V Sluka, O Yildlrlm, J Lindner, B Ocker, J Fassbender, AM Deac, AIP Advances, 6, 065321 (2016).

“Tunnelling magnetoresistance of the half-metallic compensated ferrimagnet Mn2RuxGa”, K Borisov, D Betto, YC Lau, C Fowley, A Titova; N Thiyagarajah, G Atcheson, J Lindner, AM Deac, JMD Coey, P Stamenov, K Rode, Applied Physics Letters, 108, 192407 (2016).

"Effect of deposition conditions and annealing temperature on tunnel magnetoresistance and structure of MgO-based double-barrier magnetic tunnel junctions", W Feng, C Fowley, K Bernert, V Sluka, E Kowalska, Y Aleksandrov, J Lindner, J Fassbender, HD Gan, A Kunz, R Hübner, JMD Coey, AM Deac, IEEE Transactions on Magnetics, 51, 7110604 (2015).

“Direct measurement of the magnetic anisotropy field in Mn–Ga and Mn–Co–Ga Heusler films”, C Fowley, S Ouardi, T Kubota, Y Oguz, A Neudert, K Lenz, V Sluka, J Lindner, JM Law, S Mizukami, GH Fecher, C Felser, AM Deac, Journal of Physics D : Applied Physics, 48, 164006 (2015).

“Phase diagrams of MgO magnetic tunnel junctions including the perpendicular spin-transfer torque in different geometries”, K Bernert, V Sluka, C Fowley, J Lindner, J Fassbender, AM Deac, Physical Review B, 89, 134415 (2014).

“Zero-field spin-transfer oscillators combining in-plane and out-of-plane magnetized layers”, C Fowley, V Sluka, K Bernert, J Lindner, J Fassbender, WH Rippard, MR Pufall, SE Russek, and AM Deac, Applied Physics Express, 7, 043001 (2014).

“Local modification of magnetic anisotropy and ion milling of Co/Pt multilayers using a He+ ion beam microscope” C Fowley, Z Diao, C C Faulkner, J Kally, K Ackland, G Behan, HZ Zhang, AM Deac and JMD Coey, Journal of Physics D : Applied Physics, 46, 195501 (2013).

Previous Publications:

“Electric field induced changes in the coercivity of a thin-film ferromagnet”, C Fowley, K Rode, K Oguz, H Kurt and JMD Coey, Journal of Physics D : Applied Physics, 44, 305001 (2011).

“Magnetocardiography with sensors based on giant magnetoresistance”, M Pannetier-Lecoeur, L Parkkonen, N Sergeeva-Chollet, H Polovy, C Fermon, and C Fowley, Applied Physics Letters, 98, 153705 (2011).

“Perpendicular magnetic anisotropy in CoFeB/Pd bilayers”, C Fowley, N Decorde, K Oguz, K Rode, H Kurt and JMD Coey, IEEE Transactions on Magnetics, 46, 2116-2118 (2010).

“Three-state dual spin valve structure”, BS Chun, C Fowley, M Abid, and JMD Coey, Journal of Physics D: Applied Physics, 43, 025002 (2010).

“Inverted magnetoresistance in dual spin valve structures with a synthetic antiferromagnetic free layer”, C Fowley, BS Chun, HC Wu, M Abid, JU Cho, SJ Noh, YK Kim, IV Shvets, and JMD Coey,  Applied Physics Letters, 95, 222506 (2009).

“Negative magnetoresistance in dual spin valve structures with a synthetic antiferromagnetic free layer”, C Fowley, BS Chun, and JMD Coey, IEEE Transactions on Magnetics, 45, 2403-2406 (2009).

Selected Oral Conference Contributions:

"Narrow-band tunable terahertz emission from ferrimagnetic Mn3-xGa thin films”, C Fowley, N Awari, S Kovalev, K Rode, RA Gallardo, YC Lau, D Betto, N Thiyagarajah, B Green, O Yildirim, J Lindner, J Fassbender,JMD Coey, AM Deac, M Gensch, MMM New Orleans, FC-04, November 2016.

“Zero-field spin-transfer oscillators combining in-plane and out-of-plane magnetized layers”, C Fowley, V Sluka, K Bernert, J Lindner, J Fassbender, WH Rippard, MR Pufall, SE Russek, and AM Deac, Moscow International Symposium on Magnetism MISM-2014, Moscow, June 29 – July 3, 2014.

“Direct measurement of the anisotropy field in CoMnGa thin films”, C Fowley, Y Oguz, A Neudert, C Bunce, V Sluka, JM Law, J Lindner, S Ouardi, GH Fecher, T Kubota, S Mizukami, C Felser and AM Deac, IEEE International Magnetic Conference (INTERMAG), Dresden, May 4 – 8, 2014.

“Tunnel magnetoresistance in double barrier magnetic tunnel junctions with different free layer deposition conditions”, C Fowley, W Feng, HD Gan, R Hübner, A Kunz, J Lindner, J Fassbender, JMD Coey and AM Deac, Deutsche Physiker Gemeinschaft Spring Meeting, Dresden, March 31 – April 4, 2014.

“Perpendicular magnetic anisotropy in ultrathin single layers of CoFeB”, C Fowley, N Decorde, K Oguz, K Rode, H Kurt and J M D  Coey, 11th Joint MMM-INTERMAG Conference, Washington D.C., USA, January 17-22, 2010.
 

Selected Poster Conference Contributions:

“Ion milling of Co/Pt multilayers using a helium ion microscope”, C Fowley, Z Diao, K Ackland, J M D Coey, A M Deac, LXVII Yamada Conference, “The 8th International Symposium on Metallic Multilayers (MML2013)”, Kyoto Research Park, Kyoto, Japan, May 19-24 2013.

“Switching phase diagrams of MgO-based magnetic tunnel junctions”, C Fowley, K Bernert, Y Alexandrov, H D Gan, V Sluka, E Kowalska, W Feng, J Linder, J Fassbender, J McCord, S Mangin, and A M Deac, LXVII Yamada Conference, “The 8th International Symposium on Metallic Multilayers (MML2013)”, Kyoto Research Park, Kyoto, Japan, May 19-24 2013.

“Effect of an in-plane field on microwave dynamics in point contact spin valve structures combining inplane and out-of-plane magnetic layers”, C Fowley, V Sluka, K Bernert, H D Gan, J Fassbender, A M Deac, W H Rippard, M R Pufall, and S E Russek 12th Joint MMM/Intermag Conference, Chicago, USA, January 14-18 2013.

“Microwave dynamics in point contact spin valve structures combining in-plane and out-of-plane magnetic layers with in-plane magnetic fields”, C Fowley, V Sluka, K Bernert, H D Gan, A M Deac, W H Rippard, M R Pufall, and S E Russek, 21th International Colloquium on Magnetic Films and Surfaces (ICMFS), Shanghai, China, September 24-28 2012.

“Sub-μm magnetic and sub-100 nm topological patterning of Co/Pt multi-layers using a He+ ion beam microscope”, C Fowley, Z Diao, C C Faulkner, G Behan, J Kally, H Z Zhang, and J M D Coey, INTERMAG 2012, International Magnetics Conference, Vancouver, Canada, May 7-11 2012.

“Initial magnetisation angle dependence for microwave oscillation in a metallic spin valve”, C Fowley, K Bernert, V Sluka, J Fassbender, A M Deac, W H Rippard, M R Pufall, and S E Russek, INTERMAG 2012, International Magnetics Conference, Vancouver, Canada, May 7-11 2012.

“Spin transfer oscillators with different geometries”, C Fowley, V Sluka, K Bernert and A M. Deac, SpinMV Conference, Château de Villiers-le-Mahieu, France, December 14-16 2011.

“Characterization of Co40Fe40B20/Pt Perpendicular Magnetic Anisotropy Single Layers” K Oguz, C Fowley, and J M D Coey, 20th International Colloquium on Magnetic Films and Surfaces, Berlin, Germany, July 20-24, 2009.

“Exchange bias and giant magnetoresistance in top-pinned CoFeB/IrMn  current in plane spin valves”, C Fowley, K Oguz and J M D  Coey, IEEE International Magnetics Conference, Sacremento, California, USA, May 4-8, 2009.

“Negative Magnetoresistance in GMR Spin Valve Structures”, C Fowley, B S Chun, and J M D Coey, Asian Magnetics Conference, Busan, Korea, December 10-12, 2008.

“Exchange bias in CoFeB/IrMn top-pinned spin valves”, C Fowley, K Oguz and J M D Coey, Joint European Magnetic Symposia, Dublin, Ireland, September 14-19, 2008.

“Preparation of nanopillar magnetoresistive spin valves by nanostencil methods” C Fowley, G Malinowski and J M D  Coey, 1st WUN International Conference on Spintronic Materials and Technology, York, England, August 7-10, 2007.