Structural and electronic properties of the spin-filter material CrVTiAl with disorder
- Northeastern Univ., Boston, MA (United States)
- National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States). Center for Neutron Research; U. S. Naval Academy, Annapolis, MD (United States)
- Northeastern Univ., Boston, MA (United States); AGH - Univ. of Science and Technology, Krakow (Poland)
- Northeastern Univ., Boston, MA (United States); Lappeenranta Univ. of Technology (Finland)
- Florida State Univ., Tallahassee, FL (United States). National High Magnetic Field Lab. (MagLab)
The effects of chemical disorder on the electronic properties of the spin-filter material CrVTiAl are investigated experimentally and theoretically. Synchrotron X-ray diffraction experiments on bulk CrVTiAl and the associated Rietveld analysis indicate that the crystal structure consists primarily of a mixture of a partially ordered B2 phase, a fully disordered A2 phase, and a small component of an ordered L21 or Y phase. High temperature resistivity measurements confirm the existence of a bandgap. First-principles, all-electron, self-consistent electronic structure computations show that the chemically disordered A2 and B2 phases are metallic, while the spin-filter properties of the ideal Y-type phase are preserved in the presence of L21 disorder (Cr and V mixing). The Hall coefficient is found to decrease with increasing temperature, similar to the measured increase in the conductivity, indicating the presence of thermally activated semiconductor-like carriers.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC)
- Sponsoring Organization:
- USDOE Office of Science (SC), Basic Energy Sciences (BES)
- Grant/Contract Number:
- AC02-05CH11231; FG02-07ER46352
- OSTI ID:
- 1529971
- Alternate ID(s):
- OSTI ID: 1503374
- Journal Information:
- Journal of Applied Physics, Vol. 125, Issue 12; ISSN 0021-8979
- Publisher:
- American Institute of Physics (AIP)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
Web of Science
Electrical and magnetic properties of thin films of the spin-filter material CrVTiAl
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journal | June 2019 |
Electrical and magnetic properties of thin films of the spin-filter material CrVTiAl | text | January 2019 |
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