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Elastic anomaly and internal friction of Ba0.5Sr0.5Co0.8Fe0.2O3-δ and La0.58Sr0.4Co0.2Fe0.8O3-δ

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Abstract

Elastic modulus and internal friction of Ba0.5Sr0.5Co0.8Fe0.2O3-δ (BSCF) and La0.58Sr0.4Co0.2Fe0.8O3-δ (LSCF) were determined from resonance frequencies and damping behavior, respectively, using an impulse excitation method. An elastic anomaly for BSCF around 476 K, with a corresponding peak in the internal friction, is attributed to the experimentally confirmed spin transition of Co3+. LSCF is in a ferromagnetic state below ∼220 K and in a paramagnetic state above ∼250 K. The elastic modulus of LSCF exhibits an anomaly between 473 and 1113 K, which is attributed to a transition from rhombohedral to cubic symmetry.

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ACKNOWLEDGMENTS

The authors express their sincere gratitude to Dr. E. Kentzinger (IFF) for offering PPMS facility, Mr. J. Mönch for developing the impulse excitation set-up, and Ms. Y. Yao (IEK-2) for carrying out the measurements. The authors thank Dr. S. Bauman for the preparation of the perovskite materials.

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  1. Forschungszentrum Jülich GmbH, 52428, Jülich, Germany

    Bingxin Huang, Jürgen Malzbender & Rolf W. Steinbrech

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  1. Bingxin Huang
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  2. Jürgen Malzbender
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  3. Rolf W. Steinbrech
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Correspondence to Jürgen Malzbender.

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Huang, B., Malzbender, J. & Steinbrech, R.W. Elastic anomaly and internal friction of Ba0.5Sr0.5Co0.8Fe0.2O3-δ and La0.58Sr0.4Co0.2Fe0.8O3-δ. Journal of Materials Research 26, 1388–1391 (2011). https://doi.org/10.1557/jmr.2011.164

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  • DOI: https://doi.org/10.1557/jmr.2011.164

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