New aspects of magnetic and dielectric behavior of multiferroic RMn 2O5

Y. Noda; H. Kimura; M. Fukunaga; S. Kobayashi; I. Kagomiya; K. Kohn

New aspects of magnetic and dielectric behavior of multiferroic RMn ₂O₅

Y. Noda, H. Kimura, M. Fukunaga, S. Kobayashi, I. Kagomiya, K. Kohn

Faculty of Science

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Abstract

Recent discoveries of the colossal magnetoelectric effect (CME) in TbMnO₃ by Kimura and DyMn₂O₅ by Hur gave new stage on the study of multiferroics. They discovered that electrical polarization is flopped or flipped by magnetic field. Thus, we may control the ferroelectric state not only by electric field but also by magnetic field. Polarization flop by magnetic field and polarization flip by electrical field give four-state of the system, which can be used as memory device. In this paper, recent progress on the studies of magnetic and ferroelectric properties of RMn₂O₅ is reviewed. When we measure the dielectric and magnetic structure in the H-T phase diagram, we can easily say that the origin of the CME is the phase transition phenomena induced by magnetic field. The same phenomenon was also observed against hydrostatic pressure. We discuss the origin of the polarization of RMn₂O₅ in terms of magnetic ordering pattern. New results are also shown, in which ferrielectric character and polarization flop were found in RMn₂O₅.

Original language	English
Title of host publication	Materials Science and Technology Conference and Exhibition MS and T'08
Pages	189-197
Number of pages	9
Publication status	Published - Dec 1 2008
Event	Materials Science and Technology Conference and Exhibition, MS and T'08 - Pittsburgh, PA, United States Duration: Oct 5 2008 → Oct 9 2008

Publication series

Name	Materials Science and Technology Conference and Exhibition, MS and T'08
Volume	1

Other

Other	Materials Science and Technology Conference and Exhibition, MS and T'08
Country	United States
City	Pittsburgh, PA
Period	10/5/08 → 10/9/08

Keywords

Ferroelectrics
Magnetic structure
Multiferroic
RMnO

ASJC Scopus subject areas

Materials Science(all)
Mechanics of Materials

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New aspects of magnetic and dielectric behavior of multiferroic RMn ₂O₅. / Noda, Y.; Kimura, H.; Fukunaga, M.; Kobayashi, S.; Kagomiya, I.; Kohn, K.

Materials Science and Technology Conference and Exhibition MS and T'08. 2008. p. 189-197 (Materials Science and Technology Conference and Exhibition, MS and T'08; Vol. 1).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution

Noda, Y, Kimura, H, Fukunaga, M, Kobayashi, S, Kagomiya, I & Kohn, K 2008, New aspects of magnetic and dielectric behavior of multiferroic RMn ₂O₅. in Materials Science and Technology Conference and Exhibition MS and T'08. Materials Science and Technology Conference and Exhibition, MS and T'08, vol. 1, pp. 189-197, Materials Science and Technology Conference and Exhibition, MS and T'08, Pittsburgh, PA, United States, 10/5/08.

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abstract = "Recent discoveries of the colossal magnetoelectric effect (CME) in TbMnO3 by Kimura and DyMn2O5 by Hur gave new stage on the study of multiferroics. They discovered that electrical polarization is flopped or flipped by magnetic field. Thus, we may control the ferroelectric state not only by electric field but also by magnetic field. Polarization flop by magnetic field and polarization flip by electrical field give four-state of the system, which can be used as memory device. In this paper, recent progress on the studies of magnetic and ferroelectric properties of RMn2O5 is reviewed. When we measure the dielectric and magnetic structure in the H-T phase diagram, we can easily say that the origin of the CME is the phase transition phenomena induced by magnetic field. The same phenomenon was also observed against hydrostatic pressure. We discuss the origin of the polarization of RMn2O5 in terms of magnetic ordering pattern. New results are also shown, in which ferrielectric character and polarization flop were found in RMn2O5.",

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T1 - New aspects of magnetic and dielectric behavior of multiferroic RMn 2O5

AU - Noda, Y.

AU - Kimura, H.

AU - Fukunaga, M.

AU - Kobayashi, S.

AU - Kagomiya, I.

AU - Kohn, K.

PY - 2008/12/1

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N2 - Recent discoveries of the colossal magnetoelectric effect (CME) in TbMnO3 by Kimura and DyMn2O5 by Hur gave new stage on the study of multiferroics. They discovered that electrical polarization is flopped or flipped by magnetic field. Thus, we may control the ferroelectric state not only by electric field but also by magnetic field. Polarization flop by magnetic field and polarization flip by electrical field give four-state of the system, which can be used as memory device. In this paper, recent progress on the studies of magnetic and ferroelectric properties of RMn2O5 is reviewed. When we measure the dielectric and magnetic structure in the H-T phase diagram, we can easily say that the origin of the CME is the phase transition phenomena induced by magnetic field. The same phenomenon was also observed against hydrostatic pressure. We discuss the origin of the polarization of RMn2O5 in terms of magnetic ordering pattern. New results are also shown, in which ferrielectric character and polarization flop were found in RMn2O5.

AB - Recent discoveries of the colossal magnetoelectric effect (CME) in TbMnO3 by Kimura and DyMn2O5 by Hur gave new stage on the study of multiferroics. They discovered that electrical polarization is flopped or flipped by magnetic field. Thus, we may control the ferroelectric state not only by electric field but also by magnetic field. Polarization flop by magnetic field and polarization flip by electrical field give four-state of the system, which can be used as memory device. In this paper, recent progress on the studies of magnetic and ferroelectric properties of RMn2O5 is reviewed. When we measure the dielectric and magnetic structure in the H-T phase diagram, we can easily say that the origin of the CME is the phase transition phenomena induced by magnetic field. The same phenomenon was also observed against hydrostatic pressure. We discuss the origin of the polarization of RMn2O5 in terms of magnetic ordering pattern. New results are also shown, in which ferrielectric character and polarization flop were found in RMn2O5.

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KW - Magnetic structure

KW - Multiferroic

KW - RMnO

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