Magnetodielectric response of square-coordinated MnO[sub 2] unit in cubic BiMn[sub 7]O[sub 12]

Loading...
Thumbnail Image
Journal Title
Journal ISSN
Volume Title
School of Chemical Technology | A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Date
2011
Major/Subject
Mcode
Degree programme
Language
en
Pages
072903/1-3
Series
Applied Physics Letters, Volume 98, Issue 7
Abstract
The magnetodielectric (MD) effect for BiMn7O12 with the cubic A′A′′3B4O12-type A-site-ordered perovskitestructure has been investigated. A clear negative MD response around and beyond TN has been observed and attributed to antiferromagnetic spin fluctuations. With further decreasing temperature (T⪡TN) a switching to a complex positive MD effect is found confirming additional contribution coming from the magnetic ordering. The present study underlines the importance of square-coordinated MnA′′O2 units for generating MD coupling in an A′A′′3B4O12-type structure; the magnitude of the MD effect then strongly depends on the precise chemical composition.
Description
Keywords
dielectric oxides, magnetic fields, antiferromagnetism
Other note
Citation
Imamura, N. & Singh, K. & Pelloquin, D. & Simon, Ch. & Sasagawa, T. & Karppinen, Maarit & Yamauchi, H. & Maignan, A. 2011. Magnetodielectric response of square-coordinated MnO[sub 2] unit in cubic BiMn[sub 7]O[sub 12]. Applied Physics Letters. Volume 98, Issue 7. 072903/1-3. ISSN 0003-6951 (printed). DOI: 10.1063/1.3551540.