Ferroelectric polarization flop in a frustrated magnet MnWO4 induced by magnetic fields
نویسنده
چکیده
The relationship between magnetic order and ferroelectric properties has been investigated for MnWO4 with long-wavelength magnetic structure. Spontaneous electric polarization is observed in an elliptical spiral spin phase. The magnetic-field dependence of electric polarization indicates that the noncollinear spin configuration plays a key role for the appearance of ferroelectric phase. An electric polarization flop from the b direction to the a direction has been observed when a magnetic field above 10T is applied along the b axis. This result demonstrates that an electric polarization flop can be induced by a magnetic field in a simple system without rare-earth f-moments. PACS number(s):75.80.+q, 64.70.Rh, 77.80.Fm Typeset using REVTEX
منابع مشابه
Ferroelectric polarization flop in a frustrated magnet MnWO4 induced by a magnetic field.
The relationship between magnetic order and ferroelectric properties has been investigated for MnWO4 with a long-wavelength magnetic structure. Spontaneous electric polarization is observed in an elliptical spiral spin phase. The magnetic-field dependence of electric polarization indicates that the noncollinear spin configuration plays a key role for the appearance of the ferroelectric phase. A...
متن کاملThermal expansion and pressure effect inMnWO4
MnWO4 has attracted attention because of its ferroelectric property induced by frustrated helical spin order. Strong spin-lattice interaction is necessary to explain ferroelectricity associated with this type of magnetic order. We have conducted thermal expansion measurements along the a, b, c axes revealing the existence of strong anisotropic lattice anomalies at T1=7.8 K, the temperature of t...
متن کاملObservation and coupling of domains in a spin-spiral multiferroic.
The coexistence, coupling, and manipulation of magnetic spiral domains and magnetically induced ferroelectric domains are spatially resolved by optical second harmonic generation in multiferroic MnWO4. Eight types of magnetic domains couple to two ferroelectric domains. An electric field uniquely creates a magnetic single-domain state. A magnetic field quenches the spontaneous polarization whil...
متن کاملDirectional magnetoelectric effects in MnWO4: magnetic sources of the electric polarization.
The ferroelectric order and magnetic field induced effects observed in the spiral phase of MnWO4 are described theoretically. It is demonstrated explicitly that the Dzyaloshinskii-Moriya antisymmetric interactions contribute to the correlation between spins and electric dipoles in the incommensurate and commensurate ferroelectric phases of magnetic multiferroics. However, other single-site symm...
متن کاملTransition metal oxides: multiferroics go high-TC.
The discovery by Tsuyoshi Kimura and colleagues of a multiferroic coupling in cupric oxide up to 230 K, as reported on page 291 of this issue1, is all the more remarkable as physicists had been wondering for a long time if it is possible at all to align electric dipoles by magnetic fields or change the direction of magnetization by applying voltage. To some, such a magnetoelectric coupling may ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2006