Integration of amorphous ferromagnetic oxides with multiferroic materials for room temperature magnetoelectric spintronics
- Univ. of California, Berkeley, CA (United States); Univ. of Tennessee, Knoxville, TN (United States)
- Univ. of California, Berkeley, CA (United States)
- Univ. of California, Berkeley, CA (United States); Harbin Inst. of Technology, Shenzhen (China)
- Univ. of Central Florida, Orlando, FL (United States)
- Univ. of Tennessee, Knoxville, TN (United States)
- Lovely Professional Univ., Phagwara, Punjab (India)
- Univ. of California, Berkeley, CA (United States); Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
A room temperature amorphous ferromagnetic oxide semiconductor can substantially reduce the cost and complexity associated with utilizing crystalline materials for spintronic devices. We report a new material (Fe0.66Dy0.24Tb0.1)3O7-x (FDTO), which shows semiconducting behavior with reasonable electrical conductivity (~500 mOhm-cm), an optical band-gap (2.4 eV), and a large enough magnetic moment (~200 emu/cc), all of which can be tuned by varying the oxygen content during deposition. Magnetoelectric devices were made by integrating ultrathin FDTO with multiferroic BiFeO3. A strong enhancement in the magnetic coercive field of FDTO grown on BiFeO3 validated a large exchange coupling between them. Additionally, FDTO served as an excellent top electrode for ferroelectric switching in BiFeO3 with no sign of degradation after ~1010 switching cycles. RT magneto-electric coupling was demonstrated by modulating the resistance states of spin-valve structures using electric fields.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22). Materials Sciences & Engineering Division; National Science Foundation (NSF); US Army Research Office (ARO)
- Grant/Contract Number:
- AC02-05CH11231; W911NF-13-1-0428; SC0004993; DMR-1708615; W911NF-14-1-0104
- OSTI ID:
- 1603633
- Journal Information:
- Scientific Reports, Vol. 10, Issue 1; ISSN 2045-2322
- Publisher:
- Nature Publishing GroupCopyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
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