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Multiferroic Clusters: A New Perspective for Relaxor-Type Room-Temperature Multiferroics

Henrichs, Leonard F. and Cespedes, Oscar and Bennett, James and Landers, Joachim and Salamon, Soma and Heuser, Christian and Hansen, Thomas and Helbig, Tim and Gutfleisch, Oliver and Lupascu, Doru C. and Wende, Heiko and Kleemann, Wolfgang and Bell, Andrew J. (2016):
Multiferroic Clusters: A New Perspective for Relaxor-Type Room-Temperature Multiferroics.
26, In: Advanced Functional Materials, (13), WILEY-V C H VERLAG GMBH, pp. 2111-2121, ISSN 1616301X, [Online-Edition: http://dx.doi.org/10.1002/adfm.201503335],
[Article]

Abstract

Multiferroics are promising for sensor and memory applications, but despite all efforts invested in their research no single-phase material displaying both ferroelectricity and large magnetization at room-temperature has hitherto been reported. This situation has substantially been improved in the novel relaxor ferroelectric single-phase (BiFe0.9Co0.1O3)(0.4)-(Bi1/2K1/2TiO3)(0.6), where polar nanoregions (PNR) transform into static-PNR as evidenced by piezoresponse force microscopy (PFM) and simultaneously enable congruent multiferroic clusters (MFC) to emerge from inherent strongly magnetic Bi(Fe,Co)O-3 rich regions as verified by magnetic force microscopy (MFM) and secondary ion mass spectrometry. The material's exceptionally large Neel temperature T-N = 670 +/- 10 K, as found by neutron diffraction, is proposed to be a consequence of ferrimagnetic order in MFC. On these MFC, exceptionally large direct and converse magnetoelectric (ME) coupling coefficients, approximate to 1.0 x 10(-5) s m(-1) at room-temperature, are measured by PFM and MFM, respectively. It is expected that the non-ergodic relaxor properties which are governed by the Bi1/2K1/2TiO3 component to play a vital role in the strong ME coupling, by providing an electrically and mechanically flexible environment to MFC. This new class of non-ergodic relaxor multiferroics bears great potential for applications. Especially the prospect of a ME nanodot storage device seems appealing.

Item Type: Article
Erschienen: 2016
Creators: Henrichs, Leonard F. and Cespedes, Oscar and Bennett, James and Landers, Joachim and Salamon, Soma and Heuser, Christian and Hansen, Thomas and Helbig, Tim and Gutfleisch, Oliver and Lupascu, Doru C. and Wende, Heiko and Kleemann, Wolfgang and Bell, Andrew J.
Title: Multiferroic Clusters: A New Perspective for Relaxor-Type Room-Temperature Multiferroics
Language: English
Abstract:

Multiferroics are promising for sensor and memory applications, but despite all efforts invested in their research no single-phase material displaying both ferroelectricity and large magnetization at room-temperature has hitherto been reported. This situation has substantially been improved in the novel relaxor ferroelectric single-phase (BiFe0.9Co0.1O3)(0.4)-(Bi1/2K1/2TiO3)(0.6), where polar nanoregions (PNR) transform into static-PNR as evidenced by piezoresponse force microscopy (PFM) and simultaneously enable congruent multiferroic clusters (MFC) to emerge from inherent strongly magnetic Bi(Fe,Co)O-3 rich regions as verified by magnetic force microscopy (MFM) and secondary ion mass spectrometry. The material's exceptionally large Neel temperature T-N = 670 +/- 10 K, as found by neutron diffraction, is proposed to be a consequence of ferrimagnetic order in MFC. On these MFC, exceptionally large direct and converse magnetoelectric (ME) coupling coefficients, approximate to 1.0 x 10(-5) s m(-1) at room-temperature, are measured by PFM and MFM, respectively. It is expected that the non-ergodic relaxor properties which are governed by the Bi1/2K1/2TiO3 component to play a vital role in the strong ME coupling, by providing an electrically and mechanically flexible environment to MFC. This new class of non-ergodic relaxor multiferroics bears great potential for applications. Especially the prospect of a ME nanodot storage device seems appealing.

Journal or Publication Title: Advanced Functional Materials
Volume: 26
Number: 13
Publisher: WILEY-V C H VERLAG GMBH
Uncontrolled Keywords: magnetic force microscopy, magnetoelectric, multiferroic cluster, multiferroics, piezoresponse force microscopy
Divisions: 11 Department of Materials and Earth Sciences > Material Science > Functional Materials
11 Department of Materials and Earth Sciences > Material Science
11 Department of Materials and Earth Sciences
Date Deposited: 11 May 2016 12:39
Official URL: http://dx.doi.org/10.1002/adfm.201503335
Identification Number: doi:10.1002/adfm.201503335
Funders: L.F.H acknowledges project funding by the European Commission through the ITN NANOMOTION (PITN-GA-2011-290158)., O.C. acknowledges grant EP/K00512X/1 which enabled SQUID-VSM measurements., D.C.L. and H.W. thank the Deutsche Forschungsgemeinschaft (DFG) for partial support through Forschergruppe 1509, "Ferroische Funktionsmaterialien" (Lu729/12 and WE2623/13-2)., H.W., J.L., and S.S. thank the Deutsche Forschungsgemeinschaft (DFG) for partial support through Schwerpunktprogramm 1681, Feldgesteuerte Partikel-Matrix-Wechselwirkungen (WE2623/7-1), and Stiftung Mercator (MERCUR)., Note: The Acknowledgements were corrected on April 5, 2016.
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