6533b822fe1ef96bd127cf0d
RESEARCH PRODUCT
Quasi-antiferromagnetic multilayer stacks with 90 degree coupling mediated by thin Fe oxide spacers
Kohei OhnishiRobert M. ReeveYuji InagakiMathias KläuiDaniel SchönkePascal KrautscheidTakashi KimuraTerumitsu TanakaHiromi YuasaYongshi ZhongGen NagashimaYuichiro KurokawaKimihide MatsuyamaTatsuya KawaeShuu Horiikesubject
010302 applied physicsMaterials scienceCondensed matter physicsMagnetic domainAtomic force microscopy530 PhysicsOxideGeneral Physics and Astronomy02 engineering and technology021001 nanoscience & nanotechnology530 Physik01 natural sciencesInductive couplingBuffer (optical fiber)Magnetizationchemistry.chemical_compoundchemistry0103 physical sciencesAntiferromagnetism0210 nano-technologyAntiparallel (electronics)description
We fabricated quasiantiferromagnetic (quasi-AFM) layers with alternating antiparallel magnetization in the neighboring domains via 90° magnetic coupling through an Fe-O layer. We investigated the magnetic properties and the relationship between the magnetic domain size and the 90° magnetic coupling via experiments and calculations. Two types of samples with a Ru buffer and a (Ni80Fe20)Cr40 buffer were prepared, and we found that with the NiFeCr buffer, the sample has a flatter Fe-O layer, leading to stronger 90° magnetic coupling and a smaller domain size compared with the Ru buffer sample. This trend is well explained by the bilinear and biquadratic coupling coefficients, A12 and B12, in Landau–Lifshitz–Gilbert simulations, suggesting the possibility of using both AFM and FM properties by controlling the quasi-AFM domain size.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2019-09-07 |