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Journal Articles

Wattmeter based on tunnel-effect magnetoresistance sensor

S. Soriano-Díaz, D. Ramírez-Muñoz, R. García-Gil, S. Cardoso, P. P. Freitas
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 95, 084706 (2024)
https://doi.org/10.1063/5.0205541
Published: August 2024
View articletitled, Wattmeter based on tunnel-effect magnetoresistance sensor
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Journal Articles

CoFeBX layers for MgO-based magnetic tunnel junction sensors with improved magnetoresistance and noise performance

F. Matos, R. Macedo, P. P. Freitas, S. Cardoso
Journal: AIP Advances
AIP Advances 13, 025108 (2023)
https://doi.org/10.1063/9.0000559
Published: February 2023
View articletitled, CoFeBX layers for MgO-based magnetic tunnel junction sensors with improved magnetoresistance and noise performance
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Journal Articles

Magnetodynamics in orthogonal nanocontact spin-torque nano-oscillators based on magnetic tunnel junctions

S. Jiang, M. Ahlberg, S. Chung, A. Houshang, R. Ferreira, P. P. Freitas, J. Åkerman
Journal: Applied Physics Letters
Appl. Phys. Lett. 115, 152402 (2019)
https://doi.org/10.1063/1.5121356
Published: October 2019
View articletitled, Magnetodynamics in orthogonal nanocontact spin-torque nano-oscillators based on magnetic tunnel junctions
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Journal Articles

Tuning magnetic monopole population and mobility in unidirectional array of nanomagnets as a function of lattice parameters

R. S. Gonçalves, R. P. Loreto, T. S. de Paiva, J. Borme, P. P. Freitas, C. I. L. de Araujo
Journal: Applied Physics Letters
Appl. Phys. Lett. 114, 142401 (2019)
https://doi.org/10.1063/1.5088219
Published: April 2019
View articletitled, Tuning magnetic monopole population and mobility in unidirectional array of nanomagnets as a function of lattice parameters
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Journal Articles

Broadband voltage rectifier induced by linear bias dependence in CoFeB/MgO magnetic tunnel junctions

M. Tarequzzaman, A. S. Jenkins, T. Böhnert, J. Borme, L. Martins, E. Paz, R. Ferreira, P. P. Freitas
Journal: Applied Physics Letters
Appl. Phys. Lett. 112, 252401 (2018)
https://doi.org/10.1063/1.5029363
Published: June 2018
View articletitled, Broadband voltage rectifier induced by linear bias dependence in CoFeB/MgO magnetic tunnel junctions
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Journal Articles

Reading magnetic ink patterns with magnetoresistive sensors

K. J. Merazzo, T. Costa, F. Franco, R. Ferreira, M. Zander, M. Türr, T. Becker, P. P. Freitas, S. Cardoso
Journal: AIP Advances
Series: Magnetism and Magnetic Materials
AIP Advances 8, 056633 (2018)
https://doi.org/10.1063/1.5007693
Published: January 2018
View articletitled, Reading magnetic ink patterns with magnetoresistive sensors
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Journal Articles

Effect of CoFeB electrode compositions on low frequency magnetic noise in tunneling magnetoresistance sensors

P. Wisniowski, M. Dabek, J. Wrona, S. Cardoso, P. P. Freitas
Journal: Journal of Applied Physics
J. Appl. Phys. 122, 213906 (2017)
https://doi.org/10.1063/1.5004249
Published: December 2017
View articletitled, Effect of CoFeB electrode compositions on low frequency magnetic noise in tunneling magnetoresistance sensors
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Journal Articles

Enhancing the injection locking range of spin torque oscillators through mutual coupling

M. Romera, P. Talatchian, R. Lebrun, K. J. Merazzo, P. Bortolotti, L. Vila, J. D. Costa, R. Ferreira, P. P. Freitas, M.-C. Cyrille, U. Ebels, V. Cros, J. Grollier
Journal: Applied Physics Letters
Appl. Phys. Lett. 109, 252404 (2016)
https://doi.org/10.1063/1.4972346
Published: December 2016
View articletitled, Enhancing the injection locking range of spin torque oscillators through mutual coupling
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Includes: Supplementary data
Journal Articles

Reduction of low frequency magnetic noise by voltage-induced magnetic anisotropy modulation in tunneling magnetoresistance sensors

P. Wisniowski, M. Dąbek, W. Skowronski, T. Stobiecki, S. Cardoso, P. P. Freitas
Journal: Applied Physics Letters
Appl. Phys. Lett. 105, 082404 (2014)
https://doi.org/10.1063/1.4894172
Published: August 2014
View articletitled, Reduction of low frequency magnetic noise by voltage-induced magnetic anisotropy modulation in tunneling magnetoresistance sensors
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Journal Articles

Observation of spin-dependent quantum well resonant tunneling in textured CoFeB layers

J. M. Teixeira, J. D. Costa, J. Ventura, J. B. Sousa, P. Wisniowski, P. P. Freitas
Journal: Applied Physics Letters
Appl. Phys. Lett. 104, 112414 (2014)
https://doi.org/10.1063/1.4869484
Published: March 2014
View articletitled, Observation of spin-dependent quantum well resonant tunneling in textured CoFeB layers
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Journal Articles

Linear nanometric tunnel junction sensors with exchange pinned sensing layer

D. C. Leitao, A. V. Silva, R. Ferreira, E. Paz, F. L. Deepack, S. Cardoso, P. P. Freitas
Journal: Journal of Applied Physics
Series: Magnetism and Magnetic Materials
J. Appl. Phys. 115, 17E526 (2014)
https://doi.org/10.1063/1.4869163
Published: March 2014
View articletitled, Linear nanometric tunnel junction sensors with exchange pinned sensing layer
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Journal Articles

Magnetic tunnel junction based eddy current testing probe for detection of surface defects

F. A. Cardoso, L. Rosado, R. Ferreira, E. Paz, S. Cardoso, P. M. Ramos, M. Piedade, P. P. Freitas
Journal: Journal of Applied Physics
Series: Magnetism and Magnetic Materials
J. Appl. Phys. 115, 17E516 (2014)
https://doi.org/10.1063/1.4864045
Published: February 2014
View articletitled, Magnetic tunnel junction based eddy current testing probe for detection of surface defects
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Journal Articles

An in-depth noise model for giant magnetoresistance current sensors for circuit design and complementary metal–oxide–semiconductor integration

A. Roldán, J. B. Roldán, C. Reig, S. Cardoso, F. Cardoso, R. Ferreira, P. P. Freitas
Journal: Journal of Applied Physics
Series: Magnetism and Magnetic Materials
J. Appl. Phys. 115, 17E514 (2014)
https://doi.org/10.1063/1.4865771
Published: February 2014
View articletitled, An in-depth noise model for giant magnetoresistance current sensors for circuit design and complementary metal–oxide–semiconductor integration
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Journal Articles

MgO-based magnetic tunnel junction sensors array for non-destructive testing applications

D. W. Guo, F. A. Cardoso, R. Ferreira, E. Paz, S. Cardoso, P. P. Freitas
Journal: Journal of Applied Physics
Series: Magnetism and Magnetic Materials
J. Appl. Phys. 115, 17E513 (2014)
https://doi.org/10.1063/1.4863933
Published: February 2014
View articletitled, MgO-based magnetic tunnel junction sensors array for non-destructive testing applications
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Journal Articles

Room temperature direct detection of low frequency magnetic fields in the 100 pT/Hz0.5 range using large arrays of magnetic tunnel junctions

E. Paz, S. Serrano-Guisan, R. Ferreira, P. P. Freitas
Journal: Journal of Applied Physics
Series: Magnetism and Magnetic Materials
J. Appl. Phys. 115, 17E501 (2014)
https://doi.org/10.1063/1.4859036
Published: January 2014
View articletitled, Room temperature direct detection of low frequency magnetic fields in the 100 pT/Hz0.5 range using large arrays of magnetic tunnel junctions
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Journal Articles

Resonant and non-resonant microwave absorption as a probe of the magnetic dynamics and switching in spin valves

A. A. Timopheev, N. A. Sobolev, Y. G. Pogorelov, A. V. Talalaevskij, J. M. Teixeira, S. Cardoso, P. P. Freitas, G. N. Kakazei
Journal: Journal of Applied Physics
J. Appl. Phys. 114, 023906 (2013)
https://doi.org/10.1063/1.4813449
Published: July 2013
View articletitled, Resonant and non-resonant microwave absorption as a probe of the magnetic dynamics and switching in spin valves
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Journal Articles

Giant intrinsic thermomagnetic effects in thin MgO magnetic tunnel junctions

J. M. Teixeira, J. D. Costa, J. Ventura, M. P. Fernandez-Garcia, J. Azevedo, J. P. Araujo, J. B. Sousa, P. Wisniowski, S. Cardoso, P. P. Freitas
Journal: Applied Physics Letters
Appl. Phys. Lett. 102, 212413 (2013)
https://doi.org/10.1063/1.4809569
Published: May 2013
View articletitled, Giant intrinsic thermomagnetic effects in thin MgO magnetic tunnel junctions
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Journal Articles

NiFe/CoFe/Cu/CoFe/MnIr spin valves studied by ferromagnetic resonance

A. A. Timopheev, N. A. Sobolev, Y. G. Pogorelov, S. A. Bunyaev, J. M. Teixeira, S. Cardoso, P. P. Freitas, G. N. Kakazei
Journal: Journal of Applied Physics
Series: Magnetism and Magnetic Materials
J. Appl. Phys. 113, 17D713 (2013)
https://doi.org/10.1063/1.4798615
Published: April 2013
View articletitled, NiFe/CoFe/Cu/CoFe/MnIr spin valves studied by ferromagnetic resonance
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Journal Articles

X-ray diffraction analysis and Monte Carlo simulations of CoFeB-MgO based magnetic tunnel junctions

J. Kanak, P. Wiśniowski, T. Stobiecki, A. Zaleski, W. Powroźnik, S. Cardoso, P. P. Freitas
Journal: Journal of Applied Physics
J. Appl. Phys. 113, 023915 (2013)
https://doi.org/10.1063/1.4775706
Published: January 2013
View articletitled, X-ray diffraction analysis and Monte Carlo simulations of CoFeB-MgO based magnetic tunnel junctions
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Journal Articles

Electrical ammeter based on spin-valve sensor

J. Sánchez, D. Ramírez, J. Amaral, S. Cardoso, P. P. Freitas
Journal: Review of Scientific Instruments
Rev. Sci. Instrum. 83, 105113 (2012)
https://doi.org/10.1063/1.4759020
Published: October 2012
View articletitled, Electrical ammeter based on spin-valve sensor
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