Magnetoelectric coupling in γ′-Fe4N/Pb(Mg1/3Nb2/3)0.7Ti0.3O3 multiferroic heterostructures

Abstract

Magnetoelectric coupling in γ′-Fe 4 N/ Pb(Mg 1/3 Nb 2/3) 0.7 Ti 0.3 O 3 multiferroic heterostructures

Evolution of Structural Transformation in γ′-Fe4N and GeNFe3

“…This provides an exact evidence of structural phase transition based on these typical characters, which are well in agreement with the previous reports about the structure of γ′-Fe 4 N and GeNFe 3 . The values of refined lattice constants [ a = 3.799(2) Å for γ′-Fe 4 N and a = 5.317(6) Å, c = 7.756(4) Å for GeNFe 3 ] are also well in coincidence with the previous investigations . Besides, all fitting parameters ( R p , R wp , and χ 2 ) are quite small as listed in the refined XRD patterns, suggesting that our samples are relatively good in quality.…”

“…21 The values of refined lattice constants [a = 3.799(2) Å for γ′-Fe 4 N and a = 5.317(6) Å, c = 7.756(4) Å for GeNFe 3 ] are also well in coincidence with the previous investigations. 25 Besides, all fitting parameters (R p , R wp , and χ 2 ) are quite small as listed in the refined XRD patterns, suggesting that our samples are relatively good in quality. Besides, the appearance of the superstructure has not been observed in our present work, nor has been reported in other similar works.…”

Magnetization reversal of perpendicular magnetic anisotropy regulated by ferroelectric polarization in CoFe3N/BaTiO3 heterostructures: first-principles calculations

“…Here, we build the CoFe 3 N/BaTiO 3 heterostructures is based on the previous experiment research of Fe 4 N/oxide heterostructure. 27,28,30 The binding energy (E B ) calculation is preformed to display the structural stability of different interface congurations. The magnetic anisotropy energy (MAE) is determined using the magnetic force theorem with spin-orbit coupling (SOC).…”

“…[24][25][26] In our previous experiment, epitaxial Fe 4 N lms can be grown on MgO, PMN-PT, and SrTiO 3 substrates and they all exhibit good interface and magnetic properties. [27][28][29] Experiment results show that the ME effect and magnetic anisotropy of Fe 4 N/PMN-PT heterostructure can be tailored by electric eld, 27,30 further conrmed by theoretical calculation. 31 Fe 4 N/MgO/Fe 4 N magnetic tunnel junction (MTJ) has been predicted to produce an ultrahigh tunnel magnetoresistance (TMR), 32 Fe 4 N/Alq 3 /Co and LSMO/C 60 /Fe 4 N-MTJs exhibit a negative TMR and a regulable interface.…”