This line is focused magnetotransport characterization in epitaxial FeCo films to discuss the influence of the crystal symmetry on the anisotropic magnetoresistance. The crystalline structure produces a crystalline-dependent AMR ratio when the current is applied in the directions of a hard and easy magnetization axis. From transverse and longitudinal voltages combined with a model based on the Stoner-Wohlfarth formalism is possible to determine the magnetization direction as a function of the external magnetic field and also the identification of the paths taken when the magnetic field was reduced and then reversed.
External Collaborators:
- Diego Pérez (CAB, Argentina)
- Misael León (UNI, Perú)
- Diego Gonzalez Chávez (CBPF, Brasil)
Undergraduate students: Aldair Paz, Hans Painado (UNI, Perú)

This research line aims to explore the spin transport properties of magnetic heterostructures of different nature: ferromagnetic/metallic bilayers, synthetic antiferromagnets and ferromagnetic single layers. One of the main goals is to implement the experimetal set-ups for the measurements of the spin torque ferromagnetic resonance and second harmonic.
Collaborators:
- Alejandro Butera (Magnetic Resonance Division)
- Javier E. Gomez (Magnetic Resonance Division)
- Diego Perez Morelo (Devices and Sensors Division)
- Axel Hoffmann (I-MRSEC, University of Illinois Urbana-Champaign, USA)
- Juan Carlos Rojas Sanchez (IJL, Universite de Lorraine, France)
Ph. D. students: Jose Luis Ampuero (Magnetic Resonance Laboratory)

Publications related: 

• D.  E. González Chávez, M. Asmat Pervez, L. Avilés-Félix, J. E. Gómez, A. Butera and R. L. Sommer Spin rectification by planar Hall effect in synthetic antiferromagnets J. Magn. Magn. Mater. 560 169614 (2022)

• J. L. Ampuero et al. Self-Induced Spin Pumping and Inverse Spin Hall Effect in Single FePt Thin Films ACS Appl. Electron. Mater. 6 (11) 8298 (2024)

• D. Velazquez et al. Intrinsic and extrinsic relaxation mechanisms for controlling spin current intensity in Fe100−xCo x/Ta bilayers J. Phys. D: Appl. Phys. 57 (2024) 395003

This research line aims to study the magnetization dynamics of ferro- and ferrimagnetic-based heterostructures. One of the main goals is to develop a time-resolved Kerr effect magnetometer (TR-MOKE), which allows us to explore the evolution of magnetization in the time window that goes from 10-14 s (tens of fs) up to 10-8 s (tens of ns) thanks to the use of ultra-fast lasers. With this equipment, we will be able to advance in the characterization of ferrimagnetic-based multilayers and determine some of the quantities relevant of magnetic layers: the effective damping parameter.
Collaborators:
- Javier Curiale (Magnetic Resonance Laboratory)
- Axel Brucchausen (Optics and Photonics Lab, CAB-CNEA)
- Lucian Prejbeanu (SPINTEC, France)
Ph. D. students: Jean Rodriguez Estela (Magnetic Resonance Laboratory)