Magnetization dependent tunneling conductance of ferromagnetic barriers

Article Article scientifique Article Magnetization dependent tunneling conductance of ferromagnetic barriers eng 2021-11-18 2021-11-18 author Wang Zhe 941949 author Gutierrez Lezama Ignacio 681297 author Dumcenco Dumitru 0000-0002-7388-5597 883111 author Ubrig Nicolas 0000-0002-1966-4435 742176 author Taniguchi Takashi author Watanabe Kenji author Giannini Enrico 0000-0003-3536-4771 503364 author Gibertini Marco 0000-0003-3980-5319 891620 author Morpurgo Alberto 0000-0003-0974-3620 666794 6659 10.1038/s41467-021-26973-7 34795253 2041-1723 https://www.nature.com/articles/s41467-021-26973-7 Recent experiments on van der Waals antiferromagnets have shown that measuring the temperature ( T ) and magnetic field ( H ) dependence of the conductance allows their magnetic phase diagram to be mapped. Similarly, experiments on ferromagnetic CrBr 3 barriers enabled the Curie temperature to be determined at H = 0, but a precise interpretation of the magnetoconductance data at H ≠ 0 is conceptually more complex, because at finite H there is no well-defined phase boundary. Here we perform systematic transport measurements on CrBr 3 barriers and show that the tunneling magnetoconductance depends on H and T exclusively through the magnetization M ( H , T ) over the entire temperature range investigated. The phenomenon is reproduced by the spin-dependent Fowler–Nordheim model for tunneling, and is a direct manifestation of the spin splitting of the CrBr 3 conduction band. Our analysis unveils a new approach to probe quantitatively different properties of atomically thin ferromagnetic insulators related to their magnetization by performing simple conductance measurements. Dewey 500 2 Faculté des sciences 1 false 678 Groupe Morpurgo Nature communications 12 1 7b9d062f-78f0-4beb-8313-7bf9c75c874d Article (Published version) Public Article-scientifique-from-unpaywall.pdf 2806815 application/pdf CC BY 6bb1b989-cf61-4729-97ca-54100217e345 Article (Submitted version) Public Magnetoresistance_CrBr3.pdf 1937402 application/pdf CC BY-4.0 openAccess Faculté des sciences

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Magnetization dependent tunneling conductance of ferromagnetic barriers	Nature communications			2021	378	225

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Wang, Zhe