skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Integration of amorphous ferromagnetic oxides with multiferroic materials for room temperature magnetoelectric spintronics

Journal Article · · Scientific Reports
 [1];  [2];  [2];  [3];  [2];  [2];  [2];  [4];  [5];  [2];  [6];  [4];  [7];  [2];  [5];  [1];  [5]
  1. Univ. of California, Berkeley, CA (United States); Univ. of Tennessee, Knoxville, TN (United States)
  2. Univ. of California, Berkeley, CA (United States)
  3. Univ. of California, Berkeley, CA (United States); Harbin Inst. of Technology, Shenzhen (China)
  4. Univ. of Central Florida, Orlando, FL (United States)
  5. Univ. of Tennessee, Knoxville, TN (United States)
  6. Lovely Professional Univ., Phagwara, Punjab (India)
  7. 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
Citation Metrics:
Cited by: 12 works
Citation information provided by
Web of Science

References (39)

Dilute magnetic semiconducting oxides journal August 2004
Electric field control of magnetism using BiFeO 3 -based heterostructures journal June 2014
Transparent amorphous oxide semiconductors for organic electronics: Application to inverted OLEDs journal December 2016
High-Performance Solution-Processed Amorphous Zinc−Indium−Tin Oxide Thin-Film Transistors journal August 2010
A model for the anomalous magnetoresistance in amorphous semiconductors journal January 1977
Reliable polarization switching of BiFeO 3 journal October 2012
Scalable energy-efficient magnetoelectric spin–orbit logic journal December 2018
The electro-optical properties of amorphous indium tin oxide films prepared at room temperature by pulsed laser deposition journal January 2002
Reversible electric control of exchange bias in a multiferroic field-effect device journal July 2010
Dilute magnetic oxides journal April 2006
Large positive room temperature magnetoresistance in nanogranular FeCo–Si–N thin films journal November 2013
Amorphous zinc-doped silicon oxide (SZO) resistive switching memory: manipulated bias control from selector to memristor journal January 2014
Amorphous Vanadium Oxide/Carbon Composite Positive Electrode for Rechargeable Aluminum Battery journal October 2015
Room-Temperature Ferromagnetism in Transparent Transition Metal-Doped Titanium Dioxide journal January 2001
Ionic amorphous oxide semiconductors: Material design, carrier transport, and device application journal June 2006
Material characteristics and applications of transparent amorphous oxide semiconductors journal January 2010
Novel Iron-based ternary amorphous oxide semiconductor with very high transparency, electronic conductivity and mobility journal December 2015
A ten-year perspective on dilute magnetic semiconductors and oxides journal November 2010
Magnetoresistance sign change in iron-doped amorphous carbon films at low temperatures journal May 2014
The Nature of Polarization Fatigue in BiFeO3 journal February 2011
Transparent ferromagnetic and semiconducting behavior in Fe-Dy-Tb based amorphous oxide films journal June 2016
Electronic Properties of Doped Semiconductors book January 1984
Bismuth oxide coated amorphous manganese dioxide for electrochemical capacitors journal May 2015
Giant Electric Field Tuning of Magnetic Properties in Multiferroic Ferrite/Ferroelectric Heterostructures journal June 2009
Structural, magnetic, and transport properties of high-quality epitaxial Sr2FeMoO6 thin films prepared by pulsed laser deposition journal September 2004
Challenges for semiconductor spintronics journal March 2007
Multiferroic magnetoelectric coupling effect of bilayer La 1.2 Sr 1.8 Mn 2 O 7 /PbZr 0.3 Ti 0.7 O 3 complex thin film journal May 2017
Present status of amorphous In–Ga–Zn–O thin-film transistors journal February 2010
Deterministic switching of ferromagnetism at room temperature using an electric field journal December 2014
Status and Perspectives of Multiferroic Magnetoelectric Composite Materials and Applications journal March 2016
Working hypothesis to explore novel wide band gap electrically conducting amorphous oxides and examples journal May 1996
Magnetoresistance of amorphous indium oxide films at the region of weak-strong localization crossover journal December 2001
Beyond CMOS computing with spin and polarization journal April 2018
Development of pinhole-free amorphous aluminum oxide protective layers for biomedical device applications journal June 2013
Tin-Based Amorphous Oxide: A High-Capacity Lithium-Ion-Storage Material journal May 1997
Magnetoelectric Coupling in Bilayers of Pb(Zr, Ti)O 3 Epoxy and Hot Pressed Manganite Perovskite journal January 2006
Evidence for superlocalization on a fractal network in conductive carbon-black–polymer composites journal July 1992
Optical Absorption and Infrared Photoconductivity in Amorphous Si–Au System journal February 1979
Ferromagnetism in semiconductors and oxides: prospects from a ten years' perspective text January 2011