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arXiv · 1409.5072

Coupled magnetic and electric hysteresis in the multiferroic double perovskite Lu2MnCoO6

Vivien S. Zapf·B. G. Ueland·Mark Laver·Martin Lonsky·Merlin Pohlit·Jens Müller·Tom Lancaster·Johannes S. Möller·Stephen J. Blundell·John Singleton·Jorge Mira·Susana Yañez-Vilar·Maria Antonia Señarís-Rodríguez
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Abstract

We investigate a magnetic hysteresis loop with a remanent moment that couples to electric polarization to create coupled hysteretic multiferroic behavior in Lu2MnCoO6. Measurements of elastic neutron diffraction, muon spin relaxation, and micro-Hall magnetometry demonstrate an unusual mechanism for the magnetic hysteresis, namely the hysteretic evolution of a microscopic magnetic order, and not classic ferromagnetic domain effects. We show how the frustrated spin system evolves from antiferromagnetism with an incommensurate long-wavelength modulation and strong fluctuations towards a net magnetism. We also clarify the different temperature scales for the onset of ordering, dynamics, and hysteresis.

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Vivien S. Zapf, B. G. Ueland, Mark Laver, Martin Lonsky, Merlin Pohlit, Jens Müller, Tom Lancaster, Johannes S. Möller, Stephen J. Blundell, John Singleton, Jorge Mira, Susana Yañez-Vilar, Maria Antonia Señarís-Rodríguez. 2014-09-17. Coupled magnetic and electric hysteresis in the multiferroic double perovskite Lu2MnCoO6. https://arxiv.org/abs/1409.5072

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