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Nonvolatile electric-field control of magnetization in a Y-type hexaferrite.

Shen S, Chai Y, Sun Y - Sci Rep (2015)

Bottom Line: The magnetoelectric effects in multiferroic materials enable the mutual control of electric polarization by a magnetic field and magnetization by an electric field.Here we demonstrate the prominent direct and converse magnetoelectric effects in the Y-type hexaferrite BaSrCoZnFe11AlO22 single crystal.These diverse magnetoelectric effects with large coefficients highlight the promise of hexaferrites as potential multiferroic materials.

View Article: PubMed Central - PubMed

Affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

ABSTRACT
The magnetoelectric effects in multiferroic materials enable the mutual control of electric polarization by a magnetic field and magnetization by an electric field. Nonvolatile electric-field control of magnetization is extremely important for information storage applications, but has been rarely realized in single-phase multiferroic materials. Here we demonstrate the prominent direct and converse magnetoelectric effects in the Y-type hexaferrite BaSrCoZnFe11AlO22 single crystal. The electric polarization due to conical magnetic structure can be totally reversed by a small magnetic field, giving rise to large magnetoelectric coefficients of 6000 and 4000 ps/m at 100 and 200 K, respectively. The ab-plane magnetization can be controlled by electric fields with a large hysteresis, leading to nonvolatile change of magnetization. In addition, the reversal of magnetization by electric fields is also realized at 200 K. These diverse magnetoelectric effects with large coefficients highlight the promise of hexaferrites as potential multiferroic materials.

No MeSH data available.


Nonvolatile electric control of magnetization.(a) Magnetization as a function of electric field at 100 K showing the M − E hysteresis loop. The inset shows the M–H hysteresis at low magnetic fields. (b) Four magnetization levels controlled by applying electric field in a repeated sequence of −1 MV/m → 0 → 1 MV/m → 0. No bias magnetic field is needed.
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f3: Nonvolatile electric control of magnetization.(a) Magnetization as a function of electric field at 100 K showing the M − E hysteresis loop. The inset shows the M–H hysteresis at low magnetic fields. (b) Four magnetization levels controlled by applying electric field in a repeated sequence of −1 MV/m → 0 → 1 MV/m → 0. No bias magnetic field is needed.

Mentions: Fig. 3a shows the E dependence of M along [100] direction at 100 K. The maximum E for the converse ME effect measurement is limited under 1 MV/m for safety reason. The substantial hysteresis between the data obtained during increasing and decreasing E scan produces a well-defined M – E hysteresis loop. To estimate the converse ME coefficients in the M-E hysteresis case, the magnetizations of the increasing and decreasing E-scan data were averaged. A quadratic function: is used to approximate the E dependence of M, where it includes linear and quadratic E terms25. The linear coefficient αe = 3100 ps/m and quadratic coefficient γ = 80 ps/MV were obtained, indicating the converse ME effect at 100 K is mainly dominated by the linear term. The smaller difference between the values of αe and αh in single crystal than ceramic samples27 suggests that the contribution from trapped space charges is effectively suppressed.


Nonvolatile electric-field control of magnetization in a Y-type hexaferrite.

Shen S, Chai Y, Sun Y - Sci Rep (2015)

Nonvolatile electric control of magnetization.(a) Magnetization as a function of electric field at 100 K showing the M − E hysteresis loop. The inset shows the M–H hysteresis at low magnetic fields. (b) Four magnetization levels controlled by applying electric field in a repeated sequence of −1 MV/m → 0 → 1 MV/m → 0. No bias magnetic field is needed.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4317709&req=5

f3: Nonvolatile electric control of magnetization.(a) Magnetization as a function of electric field at 100 K showing the M − E hysteresis loop. The inset shows the M–H hysteresis at low magnetic fields. (b) Four magnetization levels controlled by applying electric field in a repeated sequence of −1 MV/m → 0 → 1 MV/m → 0. No bias magnetic field is needed.
Mentions: Fig. 3a shows the E dependence of M along [100] direction at 100 K. The maximum E for the converse ME effect measurement is limited under 1 MV/m for safety reason. The substantial hysteresis between the data obtained during increasing and decreasing E scan produces a well-defined M – E hysteresis loop. To estimate the converse ME coefficients in the M-E hysteresis case, the magnetizations of the increasing and decreasing E-scan data were averaged. A quadratic function: is used to approximate the E dependence of M, where it includes linear and quadratic E terms25. The linear coefficient αe = 3100 ps/m and quadratic coefficient γ = 80 ps/MV were obtained, indicating the converse ME effect at 100 K is mainly dominated by the linear term. The smaller difference between the values of αe and αh in single crystal than ceramic samples27 suggests that the contribution from trapped space charges is effectively suppressed.

Bottom Line: The magnetoelectric effects in multiferroic materials enable the mutual control of electric polarization by a magnetic field and magnetization by an electric field.Here we demonstrate the prominent direct and converse magnetoelectric effects in the Y-type hexaferrite BaSrCoZnFe11AlO22 single crystal.These diverse magnetoelectric effects with large coefficients highlight the promise of hexaferrites as potential multiferroic materials.

View Article: PubMed Central - PubMed

Affiliation: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China.

ABSTRACT
The magnetoelectric effects in multiferroic materials enable the mutual control of electric polarization by a magnetic field and magnetization by an electric field. Nonvolatile electric-field control of magnetization is extremely important for information storage applications, but has been rarely realized in single-phase multiferroic materials. Here we demonstrate the prominent direct and converse magnetoelectric effects in the Y-type hexaferrite BaSrCoZnFe11AlO22 single crystal. The electric polarization due to conical magnetic structure can be totally reversed by a small magnetic field, giving rise to large magnetoelectric coefficients of 6000 and 4000 ps/m at 100 and 200 K, respectively. The ab-plane magnetization can be controlled by electric fields with a large hysteresis, leading to nonvolatile change of magnetization. In addition, the reversal of magnetization by electric fields is also realized at 200 K. These diverse magnetoelectric effects with large coefficients highlight the promise of hexaferrites as potential multiferroic materials.

No MeSH data available.