000171063 001__ 171063
000171063 005__ 20260505142650.0
000171063 0247_ $$2doi$$a10.1088/1361-6463/ae5dde
000171063 0248_ $$2sideral$$a149147
000171063 037__ $$aART-2026-149147
000171063 041__ $$aeng
000171063 100__ $$aMorales-Aragonés, José Ignacio
000171063 245__ $$aUltrathin tungsten films enabling enhanced electrical response to spin currents
000171063 260__ $$c2026
000171063 5060_ $$aAccess copy available to the general public$$fUnrestricted
000171063 5203_ $$aThe efficient detection of spin currents is crucial for the development of next-generation spintronic devices. Here, we demonstrate that ultrathin W layers, with thicknesses down to 2 nm—equivalent to only four atomic planes—allow for highly efficient spin-to-charge conversion. From spin pumping experiments in YIG/W bilayers, we analyzed the inverse spin Hall effect (SHE) voltage dependence on W thickness and extracted a spin Hall conductivity of σSH = −1.14(6) × 105 Ω −1 m−1, yielding effective spin Hall angles ranging from −0.27(4) to −0.88(4) over the investigated thickness range. Furthermore, assuming the Elliott–Yafet spin scattering mechanism dominates, we estimate a spin diffusion length λsd = 4.3(5) × 10−15Ωm2/ρW, where the W resistivity ρW is strongly dependent on thickness. Structural characterization, together with roomtemperature electrical resistivity measurements and the high spin-to-charge conversion efficiency observed, confirms the stabilization of the β-phase in these ultrathin W layers. We demonstrate that the monotonic increase of the inverse SHE voltage with decreasing W thickness persists down to 2-nm-thick W layer, reflecting the extremely short spin diffusion length. This allows for efficient spin-current detection in W layers below 5 nm, effectively doubling the voltage output at half the thickness. In the thinnest sample, a continuous 2-nm-thick W layer, the generated voltage exceeds 0.5 mV—well within the operating range of conventional electronics. These findings demonstrate not only the feasibility of spin-current detection in ultrathin W, but also its compatibility with conventional electronics. They highlight the strong potential of integrating ultrathin W layers with high-quality YIG films for the development of energy-efficient spintronic devices and sensors.
000171063 536__ $$9info:eu-repo/grantAgreement/ES/AEI/PID2023-146451OB-I00$$9info:eu-repo/grantAgreement/ES/AEI/PID2023-150244OB-I00$$9info:eu-repo/grantAgreement/ES/DGA/E13-23R$$9info:eu-repo/grantAgreement/ES/DGA/E29-24$$9info:eu-repo/grantAgreement/ES/DGA/T33-24$$9info:eu-repo/grantAgreement/ES/MCIU/PID2020-112914RB-I00$$9info:eu-repo/grantAgreement/ES/MICIU/PID2021-122511OB-I00$$9info:eu-repo/grantAgreement/ES/MICIU/PID2024-155708OB-I00
000171063 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttps://creativecommons.org/licenses/by/4.0/deed.es
000171063 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000171063 700__ $$aGroen, Inge
000171063 700__ $$aHueso, Luis E
000171063 700__ $$aCasanova, Fèlix
000171063 700__ $$0(orcid)0000-0002-0111-8284$$aPardo, José Ángel$$uUniversidad de Zaragoza
000171063 700__ $$0(orcid)0000-0002-8236-825X$$aSánchez-Azqueta, Carlos$$uUniversidad de Zaragoza
000171063 700__ $$0(orcid)0000-0001-9566-0738$$aDe Teresa, José María
000171063 700__ $$0(orcid)0000-0002-4123-487X$$aSangiao, Soraya$$uUniversidad de Zaragoza
000171063 7102_ $$12002$$2385$$aUniversidad de Zaragoza$$bDpto. Física Aplicada$$cÁrea Física Aplicada
000171063 7102_ $$15001$$2065$$aUniversidad de Zaragoza$$bDpto. Ciencia Tecnol.Mater.Fl.$$cÁrea Cienc.Mater. Ingen.Metal.
000171063 7102_ $$12003$$2395$$aUniversidad de Zaragoza$$bDpto. Física Materia Condensa.$$cÁrea Física Materia Condensada
000171063 773__ $$g59, 17 (2026), 175301 [13 pp.]$$pJ. phys., D. Appl. phys.$$tJournal of physics. D, Applied physics$$x0022-3727
000171063 8564_ $$s1167262$$uhttps://zaguan.unizar.es/record/171063/files/texto_completo.pdf$$yVersión publicada
000171063 8564_ $$s707757$$uhttps://zaguan.unizar.es/record/171063/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000171063 909CO $$ooai:zaguan.unizar.es:171063$$particulos$$pdriver
000171063 951__ $$a2026-05-05-13:36:54
000171063 980__ $$aARTICLE