Control of the ferroelectric properties of $\mathrm{Dy}{\mathrm{Mn}}_{2}{\mathrm{O}}_{5}$ by magnetic fields

Control of the ferroelectric properties of $Dy {Mn}_{2} O_{5}$ by magnetic fields

D. Higashiyama, S. Miyasaka, N. Kida, T. Arima, and Y. Tokura

Phys. Rev. B 70, 174405 – Published 4 November 2004

Abstract

Coupling between magnetic and dielectric properties has been attracting renewed interest because of the fundamental as well as technological importance of controlling the electric (magnetic) polarization by an external magnetic (electric) field. Here, we report the phenomenon that an external magnetic field induces and/or modifies ferroelectric states in a magnetic material, $Dy {Mn}_{2} O_{5}$ . Measurements of the temperature dependence of hysteretic polarization curves, pyroelectric current, specific heat, optical second harmonic generation, and x-ray superlattice peaks have revealed successive phase transitions between 43 and $4 K$ , accompanying three ferroelectric phases. The zero-field lowest-temperature phase $(< 8 K)$ induced by the Dy-moment ordering is a reentrant paraelectric state, but is turned into a ferroelectric state with increasing magnetic field. The phenomenon is closely related to the metamagnetic transitions of the Dy $f$ moment, indicating that all the ferroelectric phases of this material are strongly tied to the antiferromagnetic Mn spin structure affected by the $f − d$ exchange interaction. The electric phase diagram for $Dy {Mn}_{2} O_{5}$ is presented in the plane of temperature and magnetic field.

Received 20 May 2004

DOI:https://doi.org/10.1103/PhysRevB.70.174405

Authors & Affiliations

D. Higashiyama and S. Miyasaka

Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan

N. Kida

Spin Superstructure Project (SSS), ERATO, Japan Science and Technology Agency (JST), c/o National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Japan

T. Arima

Institute of Materials Science, University of Tsukuba, Tsukuba 305-8573, Japan and Spin Superstructure Project (SSS), ERATO, Japan Science and Technology Agency (JST), c/o National Institute of Advanced Industrial Science and Technology, Tsukuba, 305-8562, Japan

Y. Tokura

Department of Applied Physics, University of Tokyo, Tokyo 113-8656, Japan; Spin Superstructure Project (SSS), ERATO, Japan Science and Technology Agency (JST), c/o National Institute of Advanced Industrial Science and Technology, Tsukuba 305-8562, Japan; and Correlated Electron Research Center (CERC), National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba 305-8562, Japan

Article Text (Subscription Required)

Click to Expand

References (Subscription Required)

Click to Expand

Issue

Vol. 70, Iss. 17 — 1 November 2004

Reuse & Permissions

Access Options

Author publication services for translation and copyediting assistance advertisement

Images

Figure 1
Crystal structure of $Dy {Mn}_{2} O_{5}$ : A view along the $c$ axis (upper panel) and along the $a$ axis for the sub cells labeled 1, 2, 3 and 4 (lower panel).Reuse & Permissions
Figure 2
The polarization $(P)$ vs electric-field ( $E$ , $10 Hz$ ) curves at various temperatures in the spin-ordered state of $Dy {Mn}_{2} O_{5}$ . The ferroelectric states show the hysteretic $P − E$ curves (at 33.0, 16.6, and $13.0 K$ in the figure), while the linear ones stand for the paraelectric states (at 40.0 and $4.4 K$ ).Reuse & Permissions
Figure 3
The temperature dependence of several quantities related to the magnetic and/or dielectric phase transitions in $Dy {Mn}_{2} O_{5}$ ; (a) the integrated intensity $(I)$ of x-ray superlattice peak at (0 0 4.5) shown in Fig. 4, (b) the specific heat $(C)$ divided by temperature $(T)$ , (c) the dielectric constants for applied electric fields $(1 kHz)$ along the $a$ , $b$ and $c$ axis, (d) the spontaneous polarization ( $P_{s}^{(PE)}$ , closed circles) along the $b$ axis obtained from the polarization vs electric-field $(P − E)$ curves shown in Fig. 2, and (e) the polarization $(P_{s}^{(pyro)})$ along the $b$ axis obtained by the measurement of pyroelectric current under an applied electric field of $200 kV ∕ m$ . All the above temperature scans were done in the cooling run. In the panel (d), the temperature dependence of the second harmonic light intensity $I_{SHG}$ is shown with open circles.Reuse & Permissions
Figure 4
(Color) X-ray superlattice peak profiles in (a) $(h 0 4.5)$ and (b) $(0 0 ℓ)$ scans at various temperatures in $Dy {Mn}_{2} O_{5}$ .Reuse & Permissions
Figure 5
(Color) (a) The electric phase diagrams (X and PE: paraelectric; FE1, FE2, FE3: ferroelectric) in the plane of temperature and magnetic field as obtained from the measurement on (b) the temperature profile of the polarization $(‖ b)$ at various magnetic fields. The polarization was deduced by the integration of the pyroelectric current in the electric-field $(200 kV ∕ m)$ cooling run. The electric polarization and the applied magnetic field are parallel to the $b$ and $a$ axis, respectively. Open triangle with horizontal bars in (a) means that the transition does not appear above $3 K$ .Reuse & Permissions
Figure 6
(a) Magnetization $(M − H)$ curves and (b) magnetoelectric effect ( $P − H$ curves) in $Dy {Mn}_{2} O_{5}$ at $3 K$ . The applied magnetic field $H$ was parallel to the $a$ axis. The magnetization curve shows a clear hysteresis loop around $1.5 T$ , corresponding to the metamagnetic transition of the Dy $f$ moment. The two metamagnetic anomalies are discerned in the $H$ derivative of magnetization curves as shown by vertical dashed lines in (a) on the $H$ -increasing and -decreasing runs, respectively. (The sign of $d M ∕ d H$ in an $H$ -decreasing run is inverted.) The magnetic field dependence of the electric polarization shown in (b) was measured in an applied electric field of $200 kV ∕ m$ . In accord with the magnetic transitions, the electric polarization shows the step-like increases (decreases) with increasing (decreasing) $H$ . A large $H$ -hysteretic behavior is also seen in the $P − H$ curves (b), corresponding to that of the $M − H$ curve shown in (a), as guided by the vertical dashed lines.Reuse & Permissions

Physical Review B

covering condensed matter and materials physics

Control of the ferroelectric properties of $Dy {Mn}_{2} O_{5}$ by magnetic fields

D. Higashiyama, S. Miyasaka, N. Kida, T. Arima, and Y. Tokura

Phys. Rev. B 70, 174405 – Published 4 November 2004

Abstract

Authors & Affiliations

Article Text (Subscription Required)

References (Subscription Required)

Issue

Access Options

Physical Review B

covering condensed matter and materials physics

Control of the ferroelectric properties of DyMn2O5 by magnetic fields

D. Higashiyama, S. Miyasaka, N. Kida, T. Arima, and Y. Tokura

Phys. Rev. B 70, 174405 – Published 4 November 2004

Abstract

Authors & Affiliations

Article Text (Subscription Required)

References (Subscription Required)

Issue

Access Options

Authorization Required

Other Options

Download & Share

Images

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Log In

Search

Article Lookup

Paste a citation or DOI

Enter a citation

Control of the ferroelectric properties of $Dy {Mn}_{2} O_{5}$ by magnetic fields