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Cosmic strings in hematite

Professor Paolo G. Radaelli OSI

Dr Lee's Professor

Research theme

  • Quantum materials

Sub department

  • Condensed Matter Physics

Research groups

  • Oxide electronics
Paolo.Radaelli@physics.ox.ac.uk
Telephone: 01865 (2)70957
Clarendon Laboratory, room 111
  • About
  • Research
  • Publications

Prof Radaelli recognised with an MPLS "Excellent Supervisor" Award

Physics Award Winners
Prof Radaelli is one of the 5 Oxford Physicists recognised in the inaugural "Excellence in Research Supervision" award

Read the story at this link

Excellence in Research Supervision

Polarizing an antiferromagnet by optical engineering of the crystal field

(2020)

Authors:

Ankit S Disa, Michael Fechner, Tobia F Nova, Biaolong Liu, Michael Först, Dharmalingam Prabhakaran, Paolo G Radaelli, Andrea Cavalleri
More details from the publisher

Controlling spin current polarization through non-collinear antiferromagnetism

(2019)

Authors:

T Nan, CX Quintela, J Irwin, G Gurung, DF Shao, J Gibbons, N Campbell, K Song, SY Choi, L Guo, RD Johnson, P Manuel, RV Chopdekar, I Hallsteinsen, T Tybell, PJ Ryan, JW Kim, YS Choi, PG Radaelli, DC Ralph, EY Tsymba, MS Rzchowski, CB Eom
More details from the publisher

Micromagnetic modelling and imaging of vortex|merons structures in an oxide|metal heterostructure

(2019)

Authors:

PG Radaelli, J Radaelli, N Waterfield-Price, RD Johnson
More details from the publisher

Metis: the Solar Orbiter visible light and ultraviolet coronal imager

(2019)

Authors:

Ester Antonucci, Marco Romoli, Vincenzo Andretta, Silvano Fineschi, Petr Heinzel, J Daniel Moses, Giampiero Naletto, Gianalfredo Nicolini, Daniele Spadaro, Luca Teriaca, Arkadiusz Berlicki, Gerardo Capobianco, Giuseppe Crescenzio, Vania Da Deppo, Mauro Focardi, Fabio Frassetto, Klaus Heerlein, Federico Landini, Enrico Magli, Andrea Marco Malvezzi, Giuseppe Massone, Radek Melich, Piergiorgio Nicolosi, Giancarlo Noci, Maurizio Pancrazzi, Maria G Pelizzo, Luca Poletto, Clementina Sasso, Udo Schühle, Sami K Solanki, Leonard Strachan, Roberto Susino, Giuseppe Tondello, Michela Uslenghi, Joachim Woch, Lucia Abbo, Alessandro Bemporad, Marta Casti, Sergio Dolei, Catia Grimani, Mauro Messerotti, Marco Ricci, Thomas Straus, Daniele Telloni, Paola Zuppella, Frederic Auchère, Roberto Bruno, Angela Ciaravella, Alain J Corso, Miguel Alvarez Copano, Regina Aznar Cuadrado, Raffaella D'Amicis, Reiner Enge, Alessio Gravina, Sonja Jejčič, Philippe Lamy, Alessandro Lanzafame, Thimo Meierdierks, Ioanna Papagiannaki, Hardi Peter, German Fernandez Rico, Mewael Giday Sertsu, Jan Staub, Kanaris Tsinganos, Marco Velli, Rita Ventura, Enrico Verroi, Jean-Claude Vial, Sebastien Vives, Antonio Volpicelli, Stephan Werner, Andreas Zerr, Barbara Negri, Marco Castronuovo, Alessandro Gabrielli, Roberto Bertacin, Rita Carpentiero, Silvia Natalucci, Filippo Marliani, Marco Cesa, Philippe Laget, Danilo Morea, Stefano Pieraccini, Paolo Radaelli, Paolo Sandri, Paolo Sarra, Stefano Cesare, Felice Del Forno, Ernesto Massa, Mauro Montabone, Sergio Mottini, Daniele Quattropani, Tiziano Schillaci, Roberto Boccardo, Rosario Brando, Arianna Pandi, Cristian Baietto, Riccardo Bertone, Alberto Alvarez-Herrero, Pilar García Parejo, María Cebollero, Mauro Amoruso, Vito Centonze
More details from the publisher

Spin-wave directional anisotropies in antiferromagnetic Ba3NbFe3Si2O14

Physical Review B American Physical Society 100:13 (2019) 134429

Authors:

C Stock, RD Johnson, N Giles-Donovan, M Songvilay, JA Rodriguez-Rivera, N Lee, X Xu, Paolo Radaelli, LC Chapon, A Bombardi, S Cochran, C Niedermayer, A Schneidewind, Z Husges, Z Lu, S Meng, S-W Cheong

Abstract:

Ba3NbFe3Si2O14 (langasite) is structurally and magnetically single-domain chiral with the magnetic helicity induced through competing symmetric exchange interactions. Using neutron scattering, we show that the spin waves in antiferromagnetic langasite display directional anisotropy. On applying a time-reversal symmetry breaking magnetic field along the c axis, the spin-wave energies differ when the sign is reversed for either the momentum transfer ±Q- or applied magnetic field ±μ0H. When the field is applied within the crystallographic ab plane, the spin-wave dispersion is directionally isotropic and symmetric in ±μ0H. However, a directional anisotropy is observed in the spin-wave intensity. We discuss this directional anisotropy in the dispersion in langasite in terms of a field-induced precession of the dynamic unit cell staggered magnetization resulting from a broken twofold symmetry. Directional anisotropy, often referred to as nonreciprocal responses, can occur in antiferromagnetic phases in the absence of the Dzyaloshinskii-Moriya interaction or other effects resulting from spin-orbit coupling.
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