Invited
- Juan Gabriiel Ramirez, Magnetization Dynamics: From Fundamentals to Applications, Tercera Escuela Colombiana De Magnetismo, Universidad Nacional sede Manizales, Manizales Colombia, november 17th 2023.
- Juan Gabriel Ramírez, Magnetism dynamics of magnetic oxide heterostructures, Simposio de Imanes Permanentes y Materiales para Energías Limpias, Universidad del Valle, Cali Colombia, November 8th, 2023.
- Juan Gabriel Ramirez, Fabrication and characterization of Iron Oxide-based nanodisks for medical applications, Magnamed meeting, Universidad del País Vasco, Bilbao, October 19, 2023.
- Juan Gabriel Ramírez, Physical properties driven by phase separation in electron-correlated materials: percolation and avalanches, 4ta Escuela de Física Estadística, Universidad Nacional - Uniandes, Bogotá, October 6th, 2023.
- Juan Gabriel ramírez, Strongly correlated materials for quantum technology: Experimental approach, 2nd Workshop on Higher Structures in Algebra, Geometry, Topology and Physics
Barranquilla Colombia, February 28th, 2023.
2022 - Juan Gabriel Ramírez, Nanoscale properties of multifunctional oxide materials: Role of defects and microstructure, International Workshop Ceramics Nanomaterials, Magnetism and Cryogenics, Universidad Nacional Sede Medellín, Nov. 25th, 2022, Medellín.
- Juan Gabriel Ramírez, Neuromorphic Computing: Analog vs Digital, Neuromorphic lecture series, UC San Diego, San Diego CA, July 21st, 2022.
- Juan Gabriel Ramírez, Magnetism dynamics of oxide-magnetic heterostructures, Special Seminar, Materials Science and Engineering, Cornell University, May 11, 2022.
2021 - Juan Gabriel Ramírez, Micromagnetic simulations to explore nanoscale effects in complex materials: Phase separation and dynamics, 1st Latin-American tutorial of magnetism - Modeling and simulations on magnetism, Virtual, Nov. 8-19 2021.
- Juan Gabriel Ramírez, Fenómenos cuánticos en sistemas de baja dimensionalidad, Coloquio Física, Universidad de los Andes - Colombia, Oct. 12, 2021. [Video]
- Juan Gabriel Ramírez, Unusual Dynamical Properties of Oxide-Magnetic nanostructures: From Nanoparticles to Films, Condensed Matter Physics Seminar, Universidad Nacional La Plata - Argentina, Oct 5th, 2021.
- Juan Gabriel Ramirez, Unusual dynamical properties of oxide-magnetic heterostructures: Proximity effects. Condensed Matter Physics Seminar, Universidad de Chile, April 7, 2021. Virtual. [Video]
2020 - Juan Gabriel Ramírez, Unusual dynamical properties of oxide-magnetic heterostructures, Annual Conference on Magnetism and Magnetic Materials 2020 - Virtual Conference, Nov. 2nd
- Juan Gabriel Ramírez, Confinement effects in quantum matter, January 23, 2020, Universidad del Norte, Barranquilla, Colombia.
2019 - Juan Gabriel Ramírez, Mechanisms of the photo- and voltage-induced phase transition in the electron-correlated V2O3, XXVII International Materials Research Congress - IMRC 2019, Aug. 18-23 2019, Cancún, Mexico.
2018 - Juan Gabriel Ramírez, Tailoring novel functionalities in quantum materials, Materials Science & engineering seminar, University of Florida, September 4th, 2018, Gainesville FL USA.
- Juan Gabriel Ramírez, Size-induced multiferroicity in oxide nanoparticles, XXVII International Materials Research Congress - IMRC 2018, Aug. 19-24 2018, Cancún, Mexico.
- Juan Gabriel Ramírez, Magnetism @Uniandes, 1st Cali Magnetism School, Universidad del Valle, Feb. 26 to March 2nd. 2018 [Cali Magnetismo School]
2017 - Juan Gabriel Ramírez, Dinámica ultra-rápida de transiciones de fase de primer orden, Physics Seminal at Universidad del Valle, Oct. 18th 2017
- Juan Gabriel Ramírez, Correlaciones cuánticas en sólidos, Physics Colloquium, Universidad Distrital, September 8th 2017 [Video]
2016 - Juan Gabriel Ramírez, Pathways to control magnetization dynamics with first-order phase transitions, Physics Seminar at Physics department Bar Ilan University - Israel, Dec 20th, 2016
- Juan Gabriel Ramírez, Controlling magnetization dynamics in heterostructures with first-order phase transitions, Physics Seminar at Physics department Universidad Autonoma de Madrid, Dec 14th, 2016
- Juan Gabriel Ramírez, Strongly correlated materials: Nanoscale Phase coexistence as a tool for magnetic control in hybrid materials, 1st International Workshop on Superconductivity and Magnetism at Low Dimensionality, Universidad de los Andes, Bogotá, 05-Dec-2016.
- Juan Gabriel Ramírez, Controlling magnetization dynamics in hybrid heterostructures with first-order phase transitions. 61st Annual Conference on Magnetism and Magnetic Materials. New Orleans, October 31 - November 4, 2016
2015 - Juan Gabriel Ramírez, Control of magnetization dynamics in hybrid materials at the nanoscale. 3rd International Conference on Nanoscience, Nanotechnology, and Nanobiotechnology. The University of Brasília Brazil from 14th -18th December 2015
Contributed (recent)
- Juan Gabriel Ramirez, Magnetism dynamics of oxide-magnetic heterostructures, CMRR Spring Meeting, UC San Diego, La Jolla CA USA, May 25th, 2022.
- D. Carranza, Elizabeth Skoropata, Amlan Biswas, Michael Fitzsimmons, Ivan K. Schuller, and Juan Gabriel Ramirez, Evidence of phase separation in a (La,Pr,Ca)MnO3 thin film by ferromagnetic resonance, APS March Meeting 2021, 15-19 March, Virtual.
- Alexander Cardona, Diego Carranza, Alex Hojem, Andreas Reiber, Ivan Schuller, Juan Gabriel Ramirez, Strain control in multiferroic BiFeO3 nanoparticles, XXVII International Materials Research Congress - IMRC 2019, Aug. 18-23 2019, Cancún, Mexico.
- Alexander Cardona, Edwin Ramos, Alex Hojem, Andreas Reiber, Ivan Schuller, Juan Gabriel Ramirez, Magnetism of BiFeO3 Nanoparticles across its ferroelectric phase transition, APS March Meeting 2019, 4-8 March, Boston, MA USA.
- Edwin Ramos, Alexander Cardona, Juan Gabriel Ramirez, Coercivity Distributions in BiFeO3 nanoparticles, APS March Meeting 2019, 4-8 March, Boston, MA USA.
- John Betancourt, ... , Juan Gabriel Ramirez, Resistive switching in La0.3Ca0.7MnO3/YBa2Cu3O7-δ devices, Poster at APS March Meeting 2019, 4-8 March, Boston, MA USA.
- J. Del Valle et. al., Volatile resistive memory, and dynamics of VOX nanodevices, APS March Meeting 2018, 5-9 March, Los Angeles, CA USA.
- Juan Gabriel Ramirez et. al., Multiferroic order in BiFeO3 nanoparticles, APS March Meeting 2018, 5-9 March, Los Angeles, CA USA. [APS 2018]
- Jackeline Narváez et. al., Size-effects in the ferroelectricity of BaTiO3 single nanoparticles, APS March Meeting 2018, 5-9 March, Los Angeles, CA USA. [APS 2018]
- María F. Gómez et. al., Conmutación resistiva y ferroeléctrica en películas delgadas de BiFeO3, Congreso Nacional de Física, Cartagena Oct. 3, 2017.
- Diego Carranza et. al., Síntesis y caracterización individual de la respuesta ferroelectrica en nanopartículas de BiFeO3, Congreso Nacional de Física, Cartagena Oct. 3, 2017.
- Juan Gabriel Ramirez et. al., Size-effects in the ferroelectricity of BaTiO3 single nanoparticles, APS March Meeting 2017, March 13–17, 2017; New Orleans, Louisiana USA.
- Alexander Cardona R., Diego Carranza, Ilya Valmianski, Javier del Valle, Ivan K. Schuller, Andreas Reiber, Juan Gabriel Ramírez, Control of multiferroic order in BiFeO3 nanoparticles, 62nd Annual Conference on Magnetism and Magnetic Materials, Pittsburgh, PA Nov 6-10, 2017.
- A. Fraile Rodriguez, I. Valmianski, M. García del Muro, Juan Gabriel Ramirez, F. Kronast, I.K. Schuller,A. Labarta and X. Batlle, Domain Wall Pinning Driven by Nanoscale Phase Coexistence in Ni/V2O3 bilayers, 62nd Annual Conference on Magnetism and Magnetic Materials, Pittsburgh, PA Nov 6-10, 2017.
- Ivan K Schuller, Ali C Basaran, Jose de la Venta, Juan Gabriel Ramirez, Thomas Saerbeck, Ilya Valmianski, and Siming Wang, International French-US Laboratory on Nanoelectronics, November 4, 2016; Simple transition metal oxides.
- Juan Gabriel Ramírez, J. de la Venta, Siming Wang, Thomas Saerbeck, Ali C. Basaran, X. Batlle, and Ivan K. Schuller; Collective Mode Splitting in Coupled Ferromagnet/Oxide Heterostructures, APS March Meeting 2016
- Ilya Valmianski, J. G. Ramírez, Siming Wang, Stefan Guenon, Ivan K. Schuller; Voltage mediated metal to insulator transition in VO2 and V2O3 nanodevices, APS March Meeting 2016
- A. S. McLeod et al, Cryogenic optical nano-imaging of phase coexistence in correlated oxides, APS March Meeting 2016
- James Wampler, J. G. Ramirez, Ali Basaran, Ivan K. Schuller, Characterizing phase transitions in known materials with Magnetic Field Modulated Microwave Spectroscopy (MFMMS), APS March Meeting 2016
- Stefan Guenon, J. G. Ramirez, Ali Basaran, James Wampler, Ivan K. Schuller, Search for New Superconductors: An Electro-Magnetic Phase Transition in an Iron Meteorite Inclusion at 117 K, APS March Meeting 2016
- A. Cardona et. al., Resistive and Ferroelectric-Domain Switching in Multiferroic BiFeO3 Films, 1st workshop on superconductivity and magnetism at low dimensions 2016 - Bogotá.
Condensed Matter Physics Seminar
- D. Carranza, Correlaciones electrónicas en nanopartículas de Niquelatos de tierras raras: evidencia de localización débil a bajas temperaturas., Agosto 13th, 2019
- Edwin Ramos, FORC analysisl: a tool to understand intrinsic magnetic properties, Feb. 27th 2018
- A. Cardona, Comportamiento Multiferroico En Nanopartículas De BiFeO3, Feb. 20th 2018
- A. Cardona, Memristores basados en materiales ferroeléctricos y sus posibles aplicaciones, Abril 12 de 2016
- M. F. Gómez, Computación neuromórfica con dispositivos ferroeléctricos, Mayo 3 de 2016
Uniandes colloquium
- Correlaciones cuánticas en sólidos: Avalanchas, auto-organización y separación de fases. Oct. 24th 2016