English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Heavy metal-ferromagnet bilayer structures have attracted great researchinterest for charge-to-spin interconversion. In this work, we have investigatedthe effect of the permalloy seed layer on the Ta polycrystalline phase and itsspin Hall angle. Interestingly, for the same deposition rates the crystallinephase of Ta deposited on Py seed layer strongly depends on the thickness of theseed layer. We have observed a phase transition from $\alpha$-Ta to($\alpha$+$\beta$)-Ta while increasing the Py seed layer thickness. Theobserved phase transition is attributed to the strain at interface between Pyand Ta layers. Ferromagnetic resonance-based spin pumping studies reveal thatthe spin-mixing conductance in the to ($\alpha$+$\beta$)-Ta is relativelyhigher as compared to the to $\alpha$-Ta. Spin Hall angles of to $\alpha$-Taand to ($\alpha$+$\beta$)-Ta are extracted from inverse spin Hall effect (ISHE)measurements. Spin Hall angle of the to ($\alpha$+$\beta$)-Ta is estimated tobe $\theta$_SH=-0.15 which is relatively higher than that of to $\alpha$-Ta.Our systematic results connecting the phase of the Ta with seed layer and itseffect on the efficiency of spin to charge conversion might resolve ambiguitiesacross various literature and open up new functionalities based on the growthprocess for the emerging spintronic devices.

Effect of seed layer thickness on Ta crystalline phase and spin Hall angle