Temperature dependence of charge screening in Fe/SrTiO
                    <sub>3</sub>
                    heterostructure

Ji, Hongli; Wang, Y. G.; Li, Y.

doi:10.1209/0295-5075/119/67002

Cited by 6 publications

(3 citation statements)

References 25 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The in-plane M-H loops of the two heterostructures tested at 200 K under various electric fields are shown in figures 6(a) and (b), respectively. It is worth noting that the chargemediated ME response is weak at high temperature [25,29], so that the selected test temperature is much lower than room temperature. It is found that the saturation magnetization (M s ) at +300 kV cm −1 exhibits a noticeable increase with respect to that with no applied electric field at the maximum magnetic field of 5 kOe.…”

Section: Resultsmentioning

confidence: 99%

Enhancement of charge-mediated magnetoelectric coupling in Fe₃O₄/SrTiO₃/Ba_0.6Sr_0.4TiO₃ heterostructure

Yu¹,

Zhu²,

Li³

et al. 2020

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

The in-plane magnetic hysteresis loops of Fe 3 O 4 /SrTiO 3 (STO) and Fe 3 O 4 /STO/Ba 0.6 Sr 0.4 TiO 3 (BSTO) heterostructures have been investigated at 200 K under various electric fields. The bottom BSTO layer of the STO/BSTO bilayer is used to improve the dielectric properties of the top STO layer. The polarization of the STO/BSTO bilayer is ∼78% larger than that of the STO layer at room temperature due to the improvement of surface topography and the contribution of electrostatic interlayer coupling. A significant enlargement (∼70%) in the magnetoelectric response of Fe 3 O 4 /STO/BSTO heterostructure has been achieved at 200 K and 300 kV cm −1 after introducing the BSTO layer, since the STO/BSTO bilayer with larger dielectric constant supplies more polarization charges at its interface to the Fe 3 O 4 layer than the STO layer. It indicates that the dielectric bilayer improves the polarization and thus benefits the magnetoelectric coupling in the multiferroic heterostructure.

show abstract

Section: Resultsmentioning

confidence: 99%

Enhancement of charge-mediated magnetoelectric coupling in Fe₃O₄/SrTiO₃/Ba_0.6Sr_0.4TiO₃ heterostructure

Yu¹,

Zhu²,

Li³

et al. 2020

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

show abstract

“…The VT at the T V involves a random distribution of Fe 3+ and Fe 2+ ions opposed to a charge ordered one on the B sites showing charge localization [29]. The magnitude of the charge screening effect has a strong correlation with temperature and increases with temperature decreasing [32]. But the magnitudes of the change in saturation magnetization generated by the applied voltages are almost the same above and below the T V and, as shown in figure 3(b), even the change above the T V is slightly greater than that below the T V .…”

Section: Resultsmentioning

confidence: 99%

Charge screening-controlled Verwey phase transition in Fe₃O₄/SrTiO₃heterostructure

Ji¹,

Wang²,

Li³

2018

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Despite intensive investigations on the Verwey phase transition of Fe3O4 over half a century, the mechanism of this phase transition remains controversial and needs further research. In this work, we build the Fe3O4/SrTiO3 multiferroic heterostructure and investigate its temperature dependence of saturation magnetization under various electric fields. It is found that the charge-screening effect not only influences the magnetization but also induces the temperature of Verwey phase transition shifting ~13 K. It suggests that the Verwey phase transition has certain correlations with the electron distribution and the change of the number of minority spin electrons in the trimerons plays a dominant role in the temperature shift of phase transition.

show abstract

“…For instance, Vaz et al [8] and Tian et al [9] have demonstrated the temperature-dependent magnetism tuned by the strain effect. The charge effect evolving with the temperature has been explored in multiferroic heterostructures of Fe/SrTiO 3 and PbZrTiO 3 /LaSrMnO 3 [10,11]. Of particular interest is exploiting phase transitions stimulated by changing temperature.…”

Section: Introductionmentioning

confidence: 99%

Temperature dependences of strain and charge effects modulated by electric fields in a STO/Fe₃O₄/Au/PZT multiferroic heterostructure

Wu¹,

Wang²,

Li³

et al. 2018

J. Phys. D: Appl. Phys.

View full text Add to dashboard Cite

The temperature dependences of pure strain, pure charge, and their coexisting effects are simultaneously investigated with electric fields applied at three individual positions of an unconventional SrTiO 3 (STO)/Fe 3 O 4 /Au/PbZr 0.52 Ti 0.48 O 3 (PZT) multiferroic heterostructure. As the temperature drops, for all situations, the magnetization anomalously decreases with an increment in coercivity. The phenomenon is ascribed to the Verwey transition present in the Fe 3 O 4 . However, the magnetic responses to electric field are different for the pure strain and pure charge effects. The maximum strain-and charge-mediated coupling coefficients are 10.51 and 1.26 Oe • cm kV −1 , respectively, both obtained near the Verwey transition temperature. The combination of the two coupling mechanisms leads to the nonequivalent shift of the Verwey transition temperature under reversed electric fields, which can be explained by their interaction. It is also found that large magnetoelectric couplings can be realized over a broad temperature range when the strain and charge effects simultaneously appear.

show abstract

Temperature dependence of charge screening in Fe/SrTiO ₃ heterostructure

Cited by 6 publications

References 25 publications

Enhancement of charge-mediated magnetoelectric coupling in Fe₃O₄/SrTiO₃/Ba_0.6Sr_0.4TiO₃ heterostructure

Enhancement of charge-mediated magnetoelectric coupling in Fe₃O₄/SrTiO₃/Ba_0.6Sr_0.4TiO₃ heterostructure

Charge screening-controlled Verwey phase transition in Fe₃O₄/SrTiO₃heterostructure

Temperature dependences of strain and charge effects modulated by electric fields in a STO/Fe₃O₄/Au/PZT multiferroic heterostructure

Contact Info

Product

Resources

About

Temperature dependence of charge screening in Fe/SrTiO 3 heterostructure

Cited by 6 publications

References 25 publications

Enhancement of charge-mediated magnetoelectric coupling in Fe3O4/SrTiO3/Ba0.6Sr0.4TiO3 heterostructure

Enhancement of charge-mediated magnetoelectric coupling in Fe3O4/SrTiO3/Ba0.6Sr0.4TiO3 heterostructure

Charge screening-controlled Verwey phase transition in Fe3O4/SrTiO3heterostructure

Temperature dependences of strain and charge effects modulated by electric fields in a STO/Fe3O4/Au/PZT multiferroic heterostructure

Contact Info

Product

Resources

About

Temperature dependence of charge screening in Fe/SrTiO ₃ heterostructure

Enhancement of charge-mediated magnetoelectric coupling in Fe₃O₄/SrTiO₃/Ba_0.6Sr_0.4TiO₃ heterostructure

Enhancement of charge-mediated magnetoelectric coupling in Fe₃O₄/SrTiO₃/Ba_0.6Sr_0.4TiO₃ heterostructure

Charge screening-controlled Verwey phase transition in Fe₃O₄/SrTiO₃heterostructure

Temperature dependences of strain and charge effects modulated by electric fields in a STO/Fe₃O₄/Au/PZT multiferroic heterostructure