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Opto-thermal measurements of thermally generated spin current in Yttrium Iron Garnet

Giles, Brandon L
http://rave.ohiolink.edu/etdc/view?acc_num=osu1503024951599588

Abstract Details

2017, Doctor of Philosophy, Ohio State University, Materials Science and Engineering.
Complex interactions between spin, charge, and heat currents have set the stage for some of the most exciting physics experiments of the early 21st century. The desire to understand these interactions has inspired physicists, engineers, and material scientists, particularly in the fields of spin caloritronics and magnonics, both of which are focused on answering questions involving spin and heat interactions and the transport of pure spin current. To provide a means for understanding both the physical phenomena and technological applications associated with spin transport, the opto-thermal measurement has been developed. This experimental technique serves as a way to probe the generation, transport, and detection of spin currents by utilizing the spin Seebeck effect (SSE). The measurement involves using a laser to induce a highly localized thermal gradient, which results in the generation of a spin current in a magnetic insulator (FM). This spin current is then detected in an adjacent normal metal (NM) via the inverse spin Hall effect. The opto-thermal technique is used to study the generation of spin current in the presence of photo excited charge carriers and also to study the SSE on an ultrafast time scale. It is demonstrated that the opto-thermal technique is highly efficient for studying the myriad of different FM/NM systems relevant to the SSE. The nonlocal opto-thermal measurement is used to study the spin diffusion length in Yttrium Iron Garnet (YIG).
Roberto Myers (Advisor)
Joseph Heremans (Committee Member)
Wolfgang Windl (Committee Member)
129 p.
Materials Science
spin Seebeck, opto-thermal, spin transport

Recommended Citations

Citations

  • Giles, B. L. (2017). Opto-thermal measurements of thermally generated spin current in Yttrium Iron Garnet [Doctoral dissertation, Ohio State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=osu1503024951599588

    APA Style (7th edition)

  • Giles, Brandon. Opto-thermal measurements of thermally generated spin current in Yttrium Iron Garnet. 2017. Ohio State University, Doctoral dissertation. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=osu1503024951599588.

    MLA Style (8th edition)

  • Giles, Brandon. "Opto-thermal measurements of thermally generated spin current in Yttrium Iron Garnet." Doctoral dissertation, Ohio State University, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=osu1503024951599588

    Chicago Manual of Style (17th edition)

osu1503024951599588
445
© 2017, all rights reserved.
This open access ETD is published by The Ohio State University and OhioLINK.