Origin of enhanced anomalous Hall effect in ultrathin Pt/permalloy bilayers

Zhang, Y. Q.; Sun, N. Y.; R., W.; Shan, Rong; Zhu, Zheng-Gang

doi:10.1063/1.4942489

Cited by 10 publications

(5 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is worth noting that the maximum 𝜃 AH value of 0.03 is comparable to the lower end of spin Hall angles reported for Pt (which itself is scattered over a large range)46 , but is two times as large as 𝜃 AH of NiFe/Pt bilayer47 . In the case of NiFe/Pt, spin-orbit coupling at the interface has been cited as the cause for enhanced 𝜃 AH .…”

supporting

confidence: 67%

Anomalous Hall magnetoresistance in a ferromagnet

Yang

Luo

et al. 2018

Nat Commun

View full text Add to dashboard Cite

The anomalous Hall effect, observed in conducting ferromagnets with broken time-reversal symmetry, offers the possibility to couple spin and orbital degrees of freedom of electrons in ferromagnets. In addition to charge, the anomalous Hall effect also leads to spin accumulation at the surfaces perpendicular to both the current and magnetization direction. Here, we experimentally demonstrate that the spin accumulation, subsequent spin backflow, and spin–charge conversion can give rise to a different type of spin current-related spin current related magnetoresistance, dubbed here as the anomalous Hall magnetoresistance, which has the same angular dependence as the recently discovered spin Hall magnetoresistance. The anomalous Hall magnetoresistance is observed in four types of samples: co-sputtered (Fe1−xMnx)0.6Pt0.4, Fe1−xMnx/Pt multilayer, Fe1−xMnx with x = 0.17–0.65 and Fe, and analyzed using the drift-diffusion model. Our results provide an alternative route to study charge–spin conversion in ferromagnets and to exploit it for potential spintronic applications.

show abstract

supporting

confidence: 67%

Anomalous Hall magnetoresistance in a ferromagnet

Yang

Luo

et al. 2018

Nat Commun

View full text Add to dashboard Cite

show abstract

“…[43] In fact, anomalous Hall angles are rarely found to be very large [108] : for thick NiFe films, they are in the range of −0.2% to 0.1% [154] and for NiFe capped with a Pt layer, the values are enhanced almost one order of magnitude. [155] A similar capping-layer enhancement effect has also been observed in CFA and CFA/Pt systems. [156] We also note here the anomalous Hall angle values for Co/Pt multilayers are between 1% and 2.5% with different thicknesses of Pt, and for an ordered FePt film prepared by evaporation the maximum value of the anomalous Hall angle is 1.2%.…”

Section: Anomalous Nernst and Hall Anglessupporting

confidence: 54%

Spin‐Dependent Thermoelectric Transport in Cobalt‐Based Heusler Alloys

Granville

2020

Annalen der Physik

View full text Add to dashboard Cite

Sitting at the intersection of spintronics and thermoelectricity, research investigating the coupling of thermoelectric, magnetic, and electrical transport properties in materials has recently found that the ferromagnetic Heusler alloys are the ideal testbeds. These materials have attracted a lot of attention due to their useful magnetotransport properties and the possibility of tailoring these properties by modifying their composition or producing heterostructures. With the diverse range of interesting phenomena in the Heusler alloys, ferromagnetic Heusler alloys are also ideal candidates for engineering spin caloritronic devices that can take advantage of the interplay of the physics of heat flow, magnetism, and electric potential. The fundamental physical concepts important to spin-dependent thermoelectrics research are introduced and recent studies of several ferromagnetic Heusler compounds are reviewed, highlighting some exceptional latest experiments on half-metallic Co 2 TiSn and the ferromagnetic Weyl semimetal Co 2 MnGa. Furthermore, the potential to generate useful magnetothermoelectric voltages in electronic devices based on the anomalous Nernst effect is discussed.

show abstract

“…4(a). However, in our another research, we found spin orbit coupling proximity effect rather than MPE dominates magnetic transport property in Pt/magnetic film [25]. For SMR, two essential conditions are spin polarized current and spin orbit coupling.…”

mentioning

confidence: 89%

Spin Hall magnetoresistance in an ultrathin Co2FeAl system

Zhang

Sun

et al. 2016

Journal of Magnetism and Magnetic Materials

View full text Add to dashboard Cite

a b s t r a c tSpin Hall magnetoresistance (SMR) is observed in an ultrathin Co 2 FeAl layer covered by a thin Pt film. The Co 2 FeAl layer grown on a MgO substrate should be too thin to be continuous. The result reveals that the magnetic insulator layer, such as yttrium iron garnet (YIG) substrate which is frequently used so far, is actually not a requisite for the observation of SMR. This work may greatly help to understand the true nature of SMR effect.

show abstract

Origin of enhanced anomalous Hall effect in ultrathin Pt/permalloy bilayers

Cited by 10 publications

References 23 publications

Anomalous Hall magnetoresistance in a ferromagnet

Anomalous Hall magnetoresistance in a ferromagnet

Spin‐Dependent Thermoelectric Transport in Cobalt‐Based Heusler Alloys

Spin Hall magnetoresistance in an ultrathin Co2FeAl system

Contact Info

Product

Resources

About