Noncollinear magnetism in nanosized cobalt chromite

0506312 - ÚACH 2020 RIV US eng J - Článek v odborném periodiku
Zákutná, D. - Vlček, J. - Fitl, P. - Nemkovski, K. - Honecker, D. - Nižňanský, Daniel - Disch, S.
Noncollinear magnetism in nanosized cobalt chromite.
Physical Review B. Roč. 98, č. 6 (2018), č. článku 064407. ISSN 2469-9950. E-ISSN 2469-9969
Institucionální podpora: RVO:61388980
Klíčová slova: polarization analysis * neutron-scattering * spin-glasses * nanoparticles * multidetector * transitions * phase
Obor OECD: Inorganic and nuclear chemistry
Impakt faktor: 3.736, rok: 2018
Způsob publikování: Open access

Using a combination of neutron diffraction with XYZ polarization analysis and magnetization measurements, the noncollinear magnetism in nanosized cobalt chromite, a potential multiferroic material, is revealed. For noninteracting 26.9(1) nm nanoparticles, a bulklike behavior is identified, including a ferrimagnetic Curie temperature of 99 K and a transition to the spin spiral magnetic phase at 27 K with a temperature-dependent, incommensurate propagation vector. A lock-in transition towards a commensurate propagation vector is not observed. Much smaller, 3.1(2) nm, nanoparticles reveal a strong cluster glass behavior, characterized by ferrimagnetic behavior below the Curie temperature of 43 K and a transition to asperomagnetic behavior at 18 K, with the absence of any magnetic reflections at a base temperature of 5 K.
Trvalý link: http://hdl.handle.net/11104/0297591