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Interacting magnetic sublattices and ferrimagnetism in Sr-doped DyMnO3

Röβler, S and Harikrishnan, S and Röβler, UK and Elizabeth, Suja and Bhat, HL and Steglich, F and Wirth, S (2010) Interacting magnetic sublattices and ferrimagnetism in Sr-doped DyMnO3. In: International Conference on Magnetism (ICM 2009), 2010.

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Official URL: http://iopscience.iop.org/1742-6596/200/1/012168

Abstract

We present the magnetic properties of polycrystalline Dy1−xSrxMnO3 (0.1 ≤ x ≤ 0.4) with an orthorhombic (o) crystal structure. The parent compound, o-DyMnO3, undergoes an incommensurate antiferromagnetic ordering of the Mn spins at 39 K, followed by a spiral order at 18 K. A further antiferromagnetic transition at 5 K marks an ordering of the Dy-sublattice. Doping of divalent Sr ions results in diverse magnetization phenomena. The zero-field cooled (ZFC) and field cooled (FC) magnetization curves display the presence of strongly interacting magnetic sublattices. For x = 0.1 and 0.2, a bifurcation between the ZFC and FC magnetization sets in at around 30 and 32 K, respectively. The ZFC magnetization peaks at about 5 K, indicating antiferromagnetic Dy-couplings similar to the case of o-DyMnO3. For x = 0.3, clear signatures of ferrimagnetism and strong anisotropy are found, including negative magnetization. The compound with x = 0.4 behaves as a spin glass, similar to Dy0.5Sr0.5MnO3.

Item Type: Conference Paper
Additional Information: Copyright of this article belongs to IOP Publishing ltd.
Department/Centre: Division of Physical & Mathematical Sciences > Physics
Date Deposited: 16 Dec 2011 09:36
Last Modified: 16 Dec 2011 09:36
URI: http://eprints.iisc.ernet.in/id/eprint/40731

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