Dielectric Properties and Resource Criticality Aspects of Hexagonal Manganite

Ruff, Alexander; Li, Ziyu; Schafnitzel, Mario; Krohns, S.

doi:10.1002/9781119494096.ch16

Cited by 1 publication

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“…Schottky diodes arising at the contact-sample interfaces, can lead to considerable non-linear response of the sample to an applied electrical field, which can give rise to apparent P(£) hysteresis loops, not related to ferroelectric switching [46]. [10,12] at 120 and 160 K, which represent exper imental examples corresponding to frames (a)-(c). The 160 K curve represents a measurement for which non-intrinsic effects start to contribute to the overall polarization indicated by the small peaks in the second and the forth pulses.…”

Section: Signatures Of Ferroelectricity In Polarization Measurementsmentioning

confidence: 99%

“…Electric-field poling studies of improper ferroelectrics like YMnO 3 and ErMnO 3 are rare [9][10][11][12]. Beside their multiferroic properties, these systems are in the scientific focus as they exhibit versatile ferroelectric domain and domain-wall properties [6].…”

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confidence: 99%

“…Figure 3: (a) Schematic plots of the P(E) hysteresis loop as expected for a ferroelectric state, (b) and (c) Schematic plot of the applied field (a) and of the polarization-induced current response (b) as expected for a PUND measurement of a fer roelectric. Frames (d)-(f) show P(E) and PUND results for h-ErMnO 3[10,12] at 120 and 160 K, which represent exper imental examples corresponding to frames (a)-(c). The 160 K curve represents a measurement for which non-intrinsic effects start to contribute to the overall polarization indicated by the small peaks in the second and the forth pulses.…”

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Ferroelectric polarization in multiferroics

Krohns

Lunkenheimer

2019

Physical Sciences Reviews

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Multiferroic materials, showing ordering of both electrical and magnetic degrees of freedom, are promising candidates enabling the design of novel electronic devices. Various mechanisms ranging from geometrically or spin-driven improper ferroelectricity via lone-pairs, charge-order or -transfer support multiferroicity in single-phase or composite compounds. The search for materials showing these effects constitutes one of the most important research fields in solid-state physics during the last years, but scientific interest even traces back to the middle of the past century. Especially, a potentially strong coupling between spin and electric dipoles captured the interest to control via an electric field the magnetization or via a magnetic field the electric polarization. This would imply a promising route for novel electronics. Here, we provide a review about the dielectric and ferroelectric properties of various multiferroic systems ranging from type I multiferroics, in which magnetic and ferroelectric order develop almost independently of each other, to type II multiferroics, which exhibit strong coupling of magnetic and ferroelectric ordering. We thoroughly discuss the dielectric signatures of the ferroelectric polarization for BiFeO3, Fe3O4, DyMnO3 and an organic charge-transfer salt as well as show electric-field poling studies for the hexagonal manganites and a spin-spiral system LiCuVO4.

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Section: Signatures Of Ferroelectricity In Polarization Measurementsmentioning

confidence: 99%

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confidence: 99%

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