Spintronic terahertz emission from Ni/Pt, Ni/Au, and Ni/Ti bilayer films grown on MgO via electron beam deposition

Authors

Lourdes Nicole F. Dela Rosa National Institute of Physics, University of the Philippines Diliman
Hannah R. Bardolaza National Institute of Physics, University of the Philippines Diliman
Neil Irvin F. Cabello National Institute of Physics, University of the Philippines Diliman
John Paul R. Ferrolino Materials Science and Engineering Program, University of the Philippines Diliman
Vince Paul P. Juguilon National Institute of Physics, University of the Philippines Diliman
Ivan Cedrick M. Verona National Institute of Physics, University of the Philippines Diliman
Armando S. Somintac National Institute of Physics, University of the Philippines Diliman
Arnel A. Salvador National Institute of Physics, University of the Philippines Diliman
Alexander E. De Los Reyes National Institute of Physics, University of the Philippines Diliman
Elmer S. Estacio National Institute of Physics, University of the Philippines Diliman

Abstract

We report on the growth and terahertz (THz) spintronic emission of bilayer thin films consisting of ferromagnetic/nonmagnetic (FM/NM) metals. The FM metal used is Ni, while the the NM metals used are Pt, Au and Ti. The bilayer films were grown using electron beam deposition on MgO substrates, with nominal FM/NM layer thickness of 7 nm/6 nm. With an applied magnetic field of 20 mT, the THz spintronic emission intensities from the samples were measured using THz time-domain spectroscopy. The relative THz intensities exhibited by the different bilayer films (E_THz^Ni/Pt > E_THz^Ni/Au > E_THz^Ni/Ti) may be explained by the spin-Hall angles of the nonmagnetic metals affecting the spintronic THz emission efficiency.

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Issue

2022: Proceedings of the 40th Samahang Pisika ng Pilipinas Physics Conference

Article ID

SPP-2022-PA-19

Section

Poster Session A (Materials Science, Instrumentation, and Photonics)

Published

2022-10-18

How to Cite

[1]

LNF Dela Rosa, HR Bardolaza, NIF Cabello, JPR Ferrolino, VPP Juguilon, ICM Verona, AS Somintac, AA Salvador, AE De Los Reyes, and ES Estacio, Spintronic terahertz emission from Ni/Pt, Ni/Au, and Ni/Ti bilayer films grown on MgO via electron beam deposition, Proceedings of the Samahang Pisika ng Pilipinas 40, SPP-2022-PA-19 (2022). URL: https://proceedings.spp-online.org/article/view/SPP-2022-PA-19.