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SUMMARY:Cloaking magnetic information
DTSTART;VALUE=DATE-TIME:20170719T085000Z
DTEND;VALUE=DATE-TIME:20170719T091000Z
DTSTAMP;VALUE=DATE-TIME:20260715T040113Z
UID:indico-contribution-556-4446@indico.ific.uv.es
DESCRIPTION:Speakers: Ignasi Fina (Institut de Ciència de Materials de Ba
 rcelona (ICMAB-CSIC))\nDuring the last decade\, in the field of multiferro
 ic materials\, several systems have shown the coexistence of electric and 
 magnetic orders with coupling between them (so-called magnetoelectric coup
 ling). In the particular class of composite multiferroics\, where magnetoe
 lectric coupling takes place owing to mechanical coupling (strain mediated
 ) between a ferroelectric material and a ferromagnetic material\, the sign
  of the net magnetization in the ferromagnet can not be selected uniquely 
 by an electric field\, whatever is its sign or magnitude. This is because 
 piezoelectricity and magnetostriction (the mechanisms that trigger magneto
 electric coupling) are both even functions of electric field and strain\, 
 respectively.\n\n\nWithout overcoming this fundamental issue\, we will sho
 w by micro and macromagnetic characterization that magnetic memory effects
  present in the antiferromagnetic to ferromagnetic transition of FeRh can 
 help to circumvent it. With this purpose\, we have characterised a PMN-PT/
 FeRh structure. PMN-PT is a relaxor ferroelectric with record piezoelectri
 c coefficient\, and FeRh presents a large change in its lattice parameters
  while crossing the antiferromagnetic to ferromagnetic phase transition. T
 hus\, one can tune the magnetic order by means of electric-field\, by modi
 fying the magnetic transition temperature on FeRh via strain coupling betw
 een the piezoelectric substrate and the magnetic layer. First\, we will sh
 ow that FeRh phase transition shows thermal memory effect. After the FeRh 
 magnetization is oriented in the ferromagnetic phase by an external magnet
 ic field and FeRh is brought to the antiferromagnetic phase by cooling it\
 , if one measures the orientation of the magnetization again in the ferrom
 agnetic phase\, it partially recovers its initial state [1]. Secondly\, we
  also show that by the application of low electric field\, we can isotherm
 ally manipulate a large amount of magnetization. Magnetic imaging reveals 
 that the electrically stimulated memory effect occurs thanks to the same m
 echanism that applies for the aforementioned thermal magnetic memory effec
 t [2]\, as sketched in Figure 1.\n\n[1] J. Clarkson\, …\, I. Fina\, et a
 l.\, An invisible non-volatile solid-state memory\, arXiv preprint arXiv:1
 604.03383 \n[2] I. Fina\, et al.\, Electric-Field Adjustable Time-Dependen
 t Magnetoelectric Response in Martensitic FeRh Alloy\, ACS Applied Materia
 ls & Interfaces (2017). Online.\n\nhttps://indico.ific.uv.es/event/2851/co
 ntributions/4446/
LOCATION:Santiago de Compostela\, Facultade de Química Aula Magna
URL:https://indico.ific.uv.es/event/2851/contributions/4446/
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BEGIN:VEVENT
SUMMARY:Transversal Session II. Física para todos: Divulgación de la Fí
 sica
DTSTART;VALUE=DATE-TIME:20170719T094000Z
DTEND;VALUE=DATE-TIME:20170719T114000Z
DTSTAMP;VALUE=DATE-TIME:20260715T040113Z
UID:indico-contribution-556-4272@indico.ific.uv.es
DESCRIPTION:Speakers: Carmen Carreras (RSEF - UNED)\, Jorge Mira ()\, Migu
 el-Angel Sanchis-Lozano (University of Valencia)\nFísica para todos: Divu
 lgación de la Física\n\nhttps://indico.ific.uv.es/event/2851/contributio
 ns/4272/
LOCATION:Santiago de Compostela\, Facultade de Química Aula Magna
URL:https://indico.ific.uv.es/event/2851/contributions/4272/
END:VEVENT
BEGIN:VEVENT
SUMMARY:Nanocosmos and Laboratory Astrophysics: from molecules to dust
DTSTART;VALUE=DATE-TIME:20170719T075000Z
DTEND;VALUE=DATE-TIME:20170719T084000Z
DTSTAMP;VALUE=DATE-TIME:20260715T040113Z
UID:indico-contribution-556-4270@indico.ific.uv.es
DESCRIPTION:Speakers: José Cernicharo ()\nEvolved stars are the factories
  of interstellar dust. This dust is injected into the interstellar medium 
 and plays a key role in the evolution of astronomical objects from galaxie
 s to the embryos of planets. However\, the processes involved in dust form
 ation and evolution are still a mystery. The increased angular resolution 
 of the new generation of large telescopes\, is providing for the first tim
 e a detailed view of the conditions in the dust formation zone of evolved 
 stars\, as shown by our first observations with ALMA (Cernicharo et al. 20
 13\, Agúndez et al. 2017).\nThe aim of the NANOCOSMOS project is to take 
 advantage of these new observational capabilities to change our view on th
 e origin and evolution of dust grains. We are combining\nastronomical obse
 rvations\, modelling\, and top-level experiments to produce star dust anal
 ogues in the laboratory and identify the key species and steps that govern
  their formation. We have built two innovative setups: the Stardust chambe
 r to simulate the physical conditions of the atmosphere of evolved stars\,
  and the gas evolution chamber to identify novel molecules in the dust for
 mation zone.\nWe are also improving existing laboratory setups and combine
  different techniques to achieve original studies on individual dust grain
 s\, their processing to produce complex polycyclic aromatic hydrocarbons\,
  the chemical evolution of grain precursors and how dust grains interact w
 ith abundant astronomical molecules. Our simulation chambers have been equ
 ipped with state-of-theart in situ and ex situ diagnostics.\nOur astrophys
 ical models\, improved by the interplay between observations and laborator
 y studies\, provide powerful tools for the analysis of the wealth of data 
 provided by the new generation of telescopes. The synergy between astronom
 ers\, vacuum and microwave engineers\, molecular and plasma physicists\, s
 urface scientists\, and theoreticians in NANOCOSMOS is the key to provide 
 a cutting-edge view of cosmic dust.\n\nhttps://indico.ific.uv.es/event/285
 1/contributions/4270/
LOCATION:Santiago de Compostela\, Facultade de Química Aula Magna
URL:https://indico.ific.uv.es/event/2851/contributions/4270/
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BEGIN:VEVENT
SUMMARY:New frontiers in superconductivity: Novel states and properties fr
 om topology and interfaces
DTSTART;VALUE=DATE-TIME:20170719T070000Z
DTEND;VALUE=DATE-TIME:20170719T075000Z
DTSTAMP;VALUE=DATE-TIME:20260715T040113Z
UID:indico-contribution-556-4267@indico.ific.uv.es
DESCRIPTION:Speakers: Gertrud Zwicknagl ()\nMore than 100 years have passe
 d since the discovery of superconductivity. In the meantime this fascinati
 ng phenomenon has provided the basis for a wide range of important applica
 tions. Our fundamental understanding of superconductivity has been based o
 n the theory of Bardeen\, Cooper\, and Schrieffer known as BCS which was p
 ublished in 1957.\nDespite being a well-established field in quantum matte
 r physics\, superconductivity has been a continuous source of new discover
 ies during the past decade. The discoveries have been made possible by the
  progressive technical mastery of producing artificially structured quantu
 m matter with tunable properties. Surfaces and interfaces play a key role 
 in this context. On the theory side\, "topology" emerged as a pervasive co
 ncept in characterizing and classifying novel states of quantum matter wit
 h fascinating and sometimes exotic properties.\nIn the present talk I will
  review some recent developments and ideas which may give rise to opportun
 ities for scientific discovery and potential applications.\n\nhttps://indi
 co.ific.uv.es/event/2851/contributions/4267/
LOCATION:Santiago de Compostela\, Facultade de Química Aula Magna
URL:https://indico.ific.uv.es/event/2851/contributions/4267/
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