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

Imamura, N.; Singh, K.; Pelloquin, D.; Simon, Ch.; Sasagawa, T.; Karppinen, Maarit; Yamauchi, H.; Maignan, A.

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

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Title:	Magnetodielectric response of square-coordinated MnO[sub 2] unit in cubic BiMn[sub 7]O[sub 12]
Author(s):	Imamura, N. ; Singh, K. ; Pelloquin, D. ; Simon, Ch. ; Sasagawa, T. ; Karppinen, Maarit ; Yamauchi, H. ; Maignan, A.
Date:	2011
Language:	en
Pages:	072903/1-3
Department:	Kemian laitos Department of Chemistry
Series:	Applied Physics Letters, Volume 98, Issue 7
ISSN:	0003-6951 (printed)
DOI-number:	10.1063/1.3551540
Subject:	Chemistry, Physics
Keywords:	dielectric oxides, magnetic fields, antiferromagnetism
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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.
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.
Rights: © 2011 AIP Publishing. This article may be downloaded for personal use only. Any other use requires prior permission of the authors and the American Institute of Physics. The following article appeared in Applied Physics Letters. Volume 98, Issue 7 and may be found at http://scitation.aip.org/content/aip/journal/apl/98/7/10.1063/1.3551540.
Permanent link to this item: http://urn.fi/URN:NBN:fi:aalto-201510084565 Email this Export to RefWorks QR Code Print BibTex Tweet

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