Naslov
Dielectric response of a vector-chiral magnetic ordering

Autori
Rivas Góngora, David ; Dragičević, Martina ; Rapljenović, Željko ; Herak, Mirta ; Ivek, Tomislav ; Pregelj, Matej ; Zorko, Andrej ; Berger, Helmuth ; Arčon, Denis

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
DPG Spring Meeting of the Condensed Matter Section (SKM) - Regensburg, 31 March - 5 April 2019 / - Regensburg : Universität Regensburg, 2019

Skup
DPG Spring Meeting of the Condensed Matter Section (SKM)

Mjesto i datum
Regensburg, Njemačka, 31.03.2019. - 05.04.2019

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Nije recenziran

Ključne riječi
vector chiral ordering, dielectric response, antiferromagnet, multiferroic, magnetoelectric, phase transition, spin chain

Sažetak
β-TeVO4 is a zig-zag spin-1/2 quasi-one-dimensional system with a rich low-temperature phase diagram. Its vanadium spins interact through a nearest ferromagnetic (V-O-V) and next-nearest antiferromagnetic (V-O-Te-O-V) superexchange. The resulting frustration assisted by quantum fluctuations gives rise to three magnetic phase transitions [1]: paramagnetic to incommensurate spin density wave at TN1=4.65 K, followed by the so-called stripe phase under TN2=3.28 K, and lastly at TN3=2.28 K the system enters the vector-chiral ground state [2]. Interestingly, the complex magnetic landscape makes β-TeVO4 an ideal candidate for non-conventional magnetoelectric phases due to a symmetry which does not forbid the formation of electric dipoles [2, 3]. We present the dynamic dielectric response of β-TeVO4 single crystal samples in the presence of a magnetic field and discuss it in the context of low-temperature magnetic ordering as a potentially multiferroic phase. [1] Y. Savina et al. Phys. Rev. B 84, 104447 (2011). [2] M. Pregelj et al. Nature Communications 6 (2015), 10.1038/ncomms8255. [3] K. F. Wang et at. Adv. Phys 58, 321-448 (2009).

Izvorni jezik
Engleski

Znanstvena područja
Fizika

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