On Friday June 28th 2024, we have the pleasure to welcome in SPINTEC Tomoya Nakatani from Research Center for Magnetic and Spintronic Materials, NIMS, Japan. He will give us a seminar at 11:00 entitled :
Functionalizing tunnel magnetoresistance and anomalous Hall effect as magnetic sensors
Place : IRIG/SPINTEC, auditorium 445 CEA Building 10.05 (access to CEA requires an entry authorization. Request it before 18th at admin.spintec@cea.fr)
video conference : https://webconf.cea.fr/johanna.fischer/3618GLC7
IF THE LINK DOES NOT WORK, try with skype web App : https://webconf.cea.fr/johanna.fischer/3618GLC7?sl=1
or by phone +33 1 69 35 55 10 conf ID : 7003534453
Abstract : Spintronic devices, such as giant magnetoresistance and tunnel magnetoresistance (TMR), provide magnetic sensors for various applications with large markets. This talk will present our recent studies on magnetic sensors using TMR and anomalous Hall effect (AHE). First, after a brief introduction on the previous studies on TMR sensors, our unique strategy to obtain TMR sensors without magnetic hysteresis is described. Using these sensors, we have investigated the low-frequency 1/f noise of the sensor devices. The second topic is AHE. The giant AHE discovered in ferromagnetic and antiferromagnetic materials with topological electronic structures is of great fundamental interest. We emphasize that such giant AHE has a great potential for practical application for read head sensor for future HDDs and other novel magnetic sensors.
Biography : Tomoya Nakatani received his Ph.D. degree in Engineering from University of Tsukuba in 2011 for his research on giant magnetoresistance with Heusler alloys. After one year postdoc at NIMS. He joined an HDD company HGST, which is currently Western Digital, San Jose Research Center in California, where he developed read head technology using Heusler alloys. In 2016, he returned to NIMS as a staff researcher. Since then, he has been working on magnetic sensors using GMR, TMR and anomalous Hall effect.
