"Kharkiv Quantum Seminar" invites you to the next lecture, which will take place on February 10, 2026, at 16:00 online.
Lecturer: Javier Campo, University of Zaragoza, Zaragoza (Spain).
Lecture topic: "Decoding a new magnetic state – the 'B-phase' – discovered in MnSi at low temperatures".
Abstract: In cubic chiral magnets, the Dzyaloshinskii–Moriya interaction in a chiral crystal lattice leads to the formation of various magnetic textures, including skyrmion lattices, which are promising for spintronics and magnonics. One of the most studied materials is MnSi, in which a skyrmion lattice forms in the so-called A-phase near the Curie temperature. Recently, it has been proposed that at low temperatures the conical helimagnetic and forced-ferromagnetic phases in MnSi may be separated by another phase – possibly a metastable skyrmion lattice phase or a new phase of unknown nature near the critical magnetic field. Based on precise measurements of the alternating magnetic susceptibility, magnetic phase diagrams of oriented MnSi crystals were constructed. Upon applying a magnetic field, a new anomalous zone called the "B-phase" was discovered. The talk will discuss small-angle neutron scattering measurements and the obtained spectral characteristics to understand the spin structure of the B-phase.
About the lecturer: Javier Campo – Research Professor at the Institute of Nanoscience and Materials of Aragon (CSIC) at the University of Zaragoza. He defended his PhD thesis in 1995 at the Institute of Materials Science of Aragon (ICMA), a joint research center of CSIC and the University of Zaragoza. After that, he conducted a postdoctoral fellowship at the University of Montpellier. From 1998 to 2002, Dr. Campo worked under CSIC appointment at the Laue–Langevin Institute in Grenoble. In 2003, he returned to ICMA as a research fellow. From 2012 to 2020, he served as director of ICMA, and since 2020 he has held the position of research professor. Javier Campo is the author of over 170 scientific publications and the leader of 56 research projects. His scientific interests focus on the study of magnetic chirality, organic magnets, and materials research for energy applications using neutron scattering methods.
Event organizers: B.I. Verkin Institute for Low Temperature Physics and Engineering of the NAS of Ukraine (Doctor of Physical and Mathematical Sciences Serhii Shevchenko) and National Science Center "Kharkiv Institute of Physics and Technology" (Corresponding Member of the NAS of Ukraine Andrii Sotnikov).
Conference ID: 84858248436
Conference code: 929397
Information provided by the B.I. Verkin Institute for Low Temperature Physics and Engineering of the NAS of Ukraine