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4 p, 664.5 KB

Tunability of the critical-current density in superconductor-ferromagnet hybrids / Valle Benedí, Nuria del (Universitat Autònoma de Barcelona. Departament de Física) ; Navau Ros, Carles (Universitat Autònoma de Barcelona. Departament de Física) ; Sánchez Moreno, Álvaro (Universitat Autònoma de Barcelona. Departament de Física) ; Chen, Du-Xing (Universitat Autònoma de Barcelona. Departament de Física)
Important modifications on the magnetization loops of the superconductor have been observed in superconductor-ferromagnet hybrids due to the effects of the ferromagnetic components, which can be used for tuning the superconductor critical-current density Jc to desirable values. [...]
2011 - DOI (Digital Object Identifier)

10.1063/1.3591971
Applied physics letters, Vol. 98 (2011) , p. 202506/1-202506/3

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29 p, 822.6 KB

Tailoring staircase-like hysteresis loops in electrodeposited trisegmented magnetic nanowires : a strategy toward minimization of interwire interactions / Zhang, Jin (Universitat Autònoma de Barcelona. Departament de Física) ; Agramunt Puig, Sebastià (Universitat Autònoma de Barcelona. Departament de Física) ; Valle Benedí, Nuria del (Universitat Autònoma de Barcelona. Departament de Física) ; Navau Ros, Carles (Universitat Autònoma de Barcelona. Departament de Física) ; Baró, M. D.. (Universitat Autònoma de Barcelona. Departament de Física) ; Estrade, Sonia (Universitat de Barcelona. Departament d'Electrònica) ; Peiro, Francesca (Universitat de Barcelona. Departament d'Electrònica) ; Pané i Vidal, Salvador (Institute of Robotics and Intelligent Systems) ; Nelson, Bradley J. (Institute of Robotics and Intelligent Systems) ; Sánchez Moreno, Álvaro (Universitat Autònoma de Barcelona. Departament de Física) ; Nogués, Josep (Institut Català de Nanociència i Nanotecnologia) ; Pellicer Vilà, Eva Maria (Universitat Autònoma de Barcelona. Departament de Física) ; Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física)
A new strategy to minimize magnetic interactions between nanowires (NWs) dispersed in a fluid is proposed. Such a strategy consists of preparing trisegmented NWs containing two antiparallel ferromagnetic segments with dissimilar coercivity separated by a nonmagnetic spacer. [...]
2016 - DOI (Digital Object Identifier)

10.1021/acsami.5b11747
ACS applied materials & interfaces, Vol. 8, issue 6 (2016) , p. 4109-4117

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4 p, 325.4 KB

Using exchange bias to extend the temperature range of square loop behavior in [Pt/Co] multilayers with perpendicular anisotropy / Sort Viñas, Jordi (Universitat Autònoma de Barcelona. Departament de Física) ; Suriñach, Santiago (Suriñach Cornet) (Universitat Autònoma de Barcelona. Departament de Física) ; Garcia, F. (SPINTEC (Spin Electronics Research)) ; Auffret, Stéphane (SPINTEC (Spin Electronics Research)) ; Rodmacq, B. (SPINTEC (Spin Electronics Research)) ; Dieny, B. (SPINTEC (Spin Electronics Research)) ; Langlais, Veronique (Universitat Autònoma de Barcelona. Departament de Física) ; Muñoz Domínguez, Juan Santiago (Universitat Autònoma de Barcelona. Departament de Física) ; Baró, M. D.. (Universitat Autònoma de Barcelona. Departament de Física) ; Nogués, Josep (Universitat Autònoma de Barcelona. Departament de Física)
The temperature dependence of the magnetic properties of [Pt/Co]multilayers (ML), exhibiting perpendicular anisotropy, with and without exchange biasing with an antiferromagnet(AFM) has been investigated. [...]
2005 - DOI (Digital Object Identifier)

10.1063/1.2139840
Applied physics letters, Vol. 87, Issue 24 (December 2005) , p. 242504/1-242504/3

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4 p, 311.7 KB

Perpendicular coupling at Fe-FeF2 interfaces / Moran, T. J.. (University of California at San Diego. Physics Department) ; Nogués, Josep (University of California San Diego. Physics Department) ; Lederman, D. (University of California at San Diego. Physics Department) ; Schuller, Ivan K. (University of California at San Diego. Physics Department) ; American Physical Society
We have studied the exchange anisotropy of ferromagnetic Fe filmsgrown on antiferromagneticFeF2single crystals. The behavior of the hysteresis loops of the Fe above and below the Néel temperature TN of FeF2 indicates a 90° rotation of the ferromagnetic easy axis due to the antiferromagnetic ordering. [...]
1998 - DOI (Digital Object Identifier)

10.1063/1.120823
Applied physics letters, Vol. 72, Issue 5 (February 1998) , p. 617-619

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4 p, 299.5 KB

Tuning exchange bias / Miltenyi, P. (Rheinisch-Westfälische Technische Hochschule Aachen. Institut für physikalisches) ; Gierlings, M. (Rheinisch-Westfälische Technische Hochschule Aachen. Institut für physikalisches) ; Bamming, M. (Rheinisch-Westfälische Technische Hochschule Aachen. Institut für physikalisches) ; May, U. (Rheinisch-Westfälische Technische Hochschule Aachen. Institut für physikalisches) ; Güntherodt, G. (Rheinisch-Westfälische Technische Hochschule Aachen. Institut für physikalisches) ; Nogués, Josep (Universitat Autònoma de Barcelona. Departament de Física) ; Gruyters, M. (Hahn-Meitner Institut Berlin) ; Leighton, C. (University of California, San Diego. Department of Physics) ; Schuller, Ivan K. (University of California, San Diego. Department of Physics) ; American Physical Society
The exchange bias shift of the hysteresis loop, HE, in antiferromagnetic/ferromagnetic layer systems can be easily controlled (within certain limits) by cooling in zero field from different magnetization states above the antiferromagnetic Néel temperature, TN. [...]
1999 - DOI (Digital Object Identifier)

10.1063/1.124998
Applied physics letters, Vol. 75, Issue 15 (October 1999) , p. 2304-2306

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4 p, 306.1 KB

Fabrication and thermal stability of arrays of Fe nanodots / Liu, Kai (University of California, San Diego. Department of Physics) ; Nogués, Josep (Universitat Autònoma de Barcelona. Departament de Física) ; Leighton, C. (University of Minnesota. Department of Chemical Engineering and Materials Science) ; Masuda, H. (Tōkyō Toritsu Daigaku. Department of Applied Chemistry) ; Nishio, K. (Tōkyō Toritsu Daigaku. Department of Applied Chemistry) ; Roshchin, I. V. (University of California, San Diego. Department of Physics) ; Schuller, Ivan K. (University of California, San Diego. Department of Physics) ; American Physical Society
We have fabricated arrays of 60-nm-size magnetic Fe nanodots over a 1-cm2 -size area using nanoporous alumina membranes as shadow masks. The size and size distribution of the nanodots correlate very well with that of the membrane pores. [...]
2002 - DOI (Digital Object Identifier)

10.1063/1.1526458
Applied physics letters, Vol. 81, Num. 23 (November 2002) , p. 4434-4436

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4 p, 232.0 KB

Size effects on exchange bias in sub-100 nm ferromagnetic-antiferromagnetic dots deposited on prepatterned substrates / Baltz, Vincent (SPINTEC (Spin Electronics Research)) ; Sort Viñas, Jordi (SPINTEC (Spin Electronics Research)) ; Rodmacq, B. (SPINTEC (Spin Electronics Research)) ; Dieny, B. (SPINTEC (Spin Electronics Research)) ; Landis, S. (Commissariat à l'Énergie Atomique et aux Énergies Alternatives (França)) ; American Physical Society
Exchange bias effects have been investigated in ferromagnetic (FM)-antiferromagnetic (AFM) square dots, with lateral sizes of 90 nm, sputtered on a prepatterned Si substrate. The magnetic behavior of the dots has been compared with that of a continuous FM-AFM bilayer with the same composition. [...]
2004 - DOI (Digital Object Identifier)

10.1063/1.1757646
Applied physics letters, Vol. 84, Issue 24 (May 2004) , p. 4923-4925

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4 p, 394.7 KB

Magneto-optical study of magnetization reversal asymmetry in exchange bias / Tillmanns, A. (Rheinisch-Westfälische Technische Hochschule Aachen. Institut für physikalisches) ; Oertker, S. (Rheinisch-Westfälische Technische Hochschule Aachen. Institut für physikalisches) ; Beschoten, Bernd (Rheinisch-Westfälische Technische Hochschule Aachen. Institut für physikalisches) ; Güntherodt, G. (Rheinisch-Westfälische Technische Hochschule Aachen. Institut für physikalisches) ; Leighton, C. (University of California, San Diego. Department of Physics) ; Schuller, Ivan K. (University of California, San Diego. Department of Physics) ; Nogués, Josep (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
The asymmetric magnetization reversal in exchange biased Fe/MnF2 involves coherent (Stoner-Wohlfarth) magnetization rotation into an intermediate, stable state perpendicular to the applied field. We provide here the experimentally tested analytical conditions for the unambiguous observation of both longitudinal and transverse magnetization components using the magneto-optical Kerr effect. [...]
2006 - DOI (Digital Object Identifier)

10.1063/1.2392283
Applied physics letters, Vol. 89, Issue 20 (November 2006) , p. 202512

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4 p, 665.4 KB

Magnetization reversal, asymmetry, and role of uncompensated spins in perpendicular exchange coupled systems / Camarero, Julio (Universidad Autónoma de Madrid. Departamento de Física de la Materia Condensada) ; Miguel, J. (University of Amsterdam. Van der Waals-Zeeman Institute) ; Goedkoop, J. B. (University of Amsterdam. Van der Waals-Zeeman Institute) ; Vogel, J. (Laboratoire Louis Neel (Grenoble, França)) ; Romanens, F. (Laboratoire Louis Neel (Grenoble, França)) ; Pizzini, S. (Laboratoire Louis Neel (Grenoble, França)) ; Garcia, F. (SPINTEC (Spin Electronics Research)) ; Sort Viñas, Jordi (SPINTEC (Spin Electronics Research)) ; Dieny, B. (SPINTEC (Spin Electronics Research)) ; Brookes, N. B. (European Synchrotron Radiation Facility) ; American Physical Society
Soft x-ray resonant magnetic scattering has been used to investigate the element-selective microscopic magnetization reversal behavior of room temperature perpendicular exchange coupled ferromagnetic∕antiferromagnetic (F∕AF) systems and to study the role of the interfacial coupling strength on it. [...]
2006 - DOI (Digital Object Identifier)

10.1063/1.2402882
Applied physics letters, Vol. 89, Issue 23 (December2006) , p. 232507/1-232507/3

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10.

4 p, 246.2 KB

Controlling magnetic vortices through exchange bias / Sort Viñas, Jordi (Institució Catalana de Recerca i Estudis Avançats) ; Salazar Álvarez, Germán (Universitat Autònoma de Barcelona. Departament de Física) ; Baró, M. D.. (Universitat Autònoma de Barcelona. Departament de Física) ; Dieny, B. (SPINTEC (Spin Electronics Research)) ; Hoffmann, Axel (Argonne National Laboratory. Materials Science Division) ; Novosad, V. (Argonne National Laboratory. Materials Science Division) ; Nogués, Josep (Universitat Autònoma de Barcelona. Departament de Física) ; American Physical Society
The magnetization reversal in Permalloy (Py) and Py-IrMn disks (1μm diameter) is investigated. The Py disks reverse their magnetization via vortex state formation. Conversely, if the Py-IrMn disks are field cooled from above the blocking temperatureTB, a critical angle with respect to the cooling direction is set, beyond which the vortex no longer nucleates. [...]
2006 - DOI (Digital Object Identifier)

10.1063/1.2165290
Applied physics letters, Vol. 88, Issue 4 (January 2006) , p. 042502/1-042502/3

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