Quantitative separation of planar Nernst effects in harmonic Hall measurements of spin–orbit torques in Pt/Co/HfO/Ta multilayers
Changjin Yun, Yonghwan Jo, Mingu Kim, Seunghoon Yu, Jinhyeok Park, Seungmo Yang, Sungjoong Joo, Kungwon Rhie, Kyujoon Lee · 2025
Read Quantitative separation of planar Nernst effects in harmonic Hall measurements of spin–orbit torques in Pt/Co/HfO/Ta multilayers by Changjin Yun, Yonghwan Jo, Mingu Kim, Seunghoon Yu, Jinhyeok Park, Seungmo Yang, Sungjoong Joo, Kungwon Rhie, Kyujoon Lee (2025) in the Tower of Babel, a free online library of public-domain works preserved in clean, searchable text. No sign-up. The full text is served as a plain-text file at a predictable URL, where text is present: https://antarctic-labs.com/tower-of-babel/pmc-12808109.txt.
Description
Changjin Yun and eight co-authors wrote this 2025 physics study on measuring spin-orbit torques, the twists that electron spin applies to a magnet in layered films. Such twists could switch memory bits with little power, but heat effects muddy their measurement. The team studied films of platinum, cobalt, hafnium oxide, and tantalum.
One sample, built with a rougher platinum layer, showed both a stronger twist and an odd extra signal. By flipping the magnetic field and reading the pattern of the signal, the team showed the extra part came from a heat-driven effect, the planar Nernst effect, not from spin at all. With that part stripped out, the rough sample's true twist stood about thirty-nine percent above the smooth one's. The method offers a clean way to part heat from spin in such films.
Catalog record
| CREATOR | Changjin Yun, Yonghwan Jo, Mingu Kim, Seunghoon Yu, Jinhyeok Park, Seungmo Yang, Sungjoong Joo, Kungwon Rhie, Kyujoon Lee |
|---|---|
| YEAR | 2025 |
| COLLECTION | PAPERS |
| FORMAT | TXT |
| FILE SIZE | 24 KB |
| VERSION | 1.0 |
| LICENSE | CC BY 4.0 |
| RIGHTS | CC BY |
| SOURCE | Europe PMC |