Electric Field Tuning Non-volatile Magnetism in Half-Metallic Alloys Co2FeAl/Pb(Mg1/3Nb2/3)O3-PbTiO3 Heterostructure

Abstract

We reported the non-volatile electric field-mediated magnetic properties in the half-metallic Heusler alloy Co2FeAl/Pb(Mg1/3Nb2/3)O3-PbTiO3 heterostructure at room temperature. The remanent magnetization with different applied electric field along [100] and [01-1] directions was achieved, which showed the non-volatile remanent magnetization driven by an electric field. The two giant reversible and stable remanent magnetization states were obtained by applying pulsed electric field. This can be attributed to the piezostrain effect originating from the piezoelectric substrate, which can be used for magnetoelectric-based memory devices.

First‐Principles Investigation on Thermoelectric and Vibrational Properties of Half‐Metallic Ir2MnX (X = B, Al, Ga, In) Heusler Alloys

“…For device applications, it is necessary to understand both electronic and magnetic properties. A most important feature of the HAs is magnetoelectric, magneto-optical, [11,12] topological insulators, [13][14][15] and superconductivity. [16] In the past few years, considerable progress has been made in the theoretical and technological fields of conceptual understanding of semiconducting [17] and semimetallic [18,19] materials.…”

“…For device applications, it is necessary to understand both electronic and magnetic properties. A most important feature of the HAs is magnetoelectric, magneto‐optical, [ 11,12 ] topological insulators, [ 13–15 ] and superconductivity. [ 16 ]…”

Disclosing odd symmetry, strain driven magnetic response of Co on Pt/PMN-PT (0 1 1)

“…Thus, while a symmetric response with respect to poling inversion is considered the normal case if driven by strain and magnetoelastic coupling [12][13][14][15], also several previous records of nonsymmetric magnetic response on PMNPT (0 1 1) upon poling field reversal exist. Some exploit on pur pose minor FE loops [8,[16][17][18] as already suggested in [7], and e.g. [8,16] clearly distinguish between unipolar and bipolar sweeps.…”

Piezostrain modulation of magnetic damping in MBE-grown epitaxial Co2FeAl/GaAs heterostructure

“…Aiming for this demand, electric voltage control of magnetism by designing ferromagnetic/ferroelectric (FM/FE) heterostructures via non-volatile polarization charge [7][8][9][10] or non-volatile strain derived from the underneath FE layer has been proved to be an efficient method in recent years. The ferroelectric crystals of PbZr 1−x Ti x O 3 (PZT) [16], Pb(Mg 1/3 Nb 2/3 ) 0.7 Ti 0.3 O 3 (PMN-PT) [17], and [Pb(Zn 1/3 Nb 2/3 )O 3 ] x -[PbTiO 3 ] 1−x (PZN-PT) [18] so on, are commonly adapted as a FE layer for their large piezoelectric property, and electric control of magnetization of the adjacent FM layer such as CoFeB [19][20][21][22], FeCo [23], Ni(Fe or Co) [24][25][26], and Co-based Heusler alloys [27][28][29][30][31][32][33][34] have been successfully demonstrated. The converse magnetoelectric (CME) coupling effect in FM/FE heterostructures contains the piezostrain-mediated effect [36][37][38], exchange bias-mediated effect [39,40], and charge-mediated effect [8,9].…”

“…Recent years, Co-based full-Heusler ferromagnetic alloy films have been extensively studied and integrated into novel spintronic devices as spin-injection source, for their appealing properties of high Curie temperature and spin polarization as well as low damping constant [44][45][46][47]. Electric voltage manipulation of magnetic anisotropy and switching has been previously studied with Co 2 FeAl (CFA), Co 2 MnSi (CMS), and Co 2 MnAl (CMA) as FM layer in FM/FE heterostructure [27][28][29][30][31][32][33][34]. However, possible magnetic damping constant manipulation of epitaxial Co 2 FeAl thin film via applying electric voltage and its associated mechanism is not yet investigated.…”