Magnetodielectric coupling by exchange striction in Y2Cu2O5

U. Adem*, G. Nenert, [No Value] Arramel, N. Mufti, G. R. Blake, T. T. M. Palstra

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

16 Citaten (Scopus)
299 Downloads (Pure)

Samenvatting

We have studied the magnetodielectric response of Y2Cu2O5, the so-called blue phase in the Y2O3-CuO-BaO phase diagram. Based on symmetry principles, we predict and demonstrate magneto-dielectric coupling on a single crystal sample. We report an anomaly in the dielectric constant at the ordering temperature of the Cu spins. We probe the magnetic field-induced phase transitions between four different magnetic phases using magneto-capacitance measurements, demonstrating relatively strong magnetodielectric coupling. We observe an increase in dielectric constant in the spin-flip phase where there exists spontaneous magnetization. We construct a detailed magnetic phase diagram. The magnetodielectric coupling is analyzed in terms of striction induced by symmetric superexchange and optical phonon frequency shifts.

Originele taal-2English
Pagina's (van-tot)393-399
Aantal pagina's7
TijdschriftEuropean Physical Journal B
Volume71
Nummer van het tijdschrift3
DOI's
StatusPublished - okt-2009

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