Exchange Spring in a Heterostructure with Pd{sub 0.96}Fe{sub 0.04} Low-Temperature Ferromagnet
- Institute of Physics, Kazan Federal University (Russian Federation)
The exchange bias of the magnetic hysteresis loop and the exchange-spring effect have been observed in thin-film heterostructures comprising layers of Pd{sub 0.96}Fe{sub 0.04} low-temperature ferromagnet, metallic cobalt, and cobalt monoxide (CoO) grown on single-crystalline sapphire by methods of magnetron sputtering and molecular beam epitaxy in an ultrahigh-vacuum system. It is established that the exchange anisotropy of Pd{sub 0.96}Fe{sub 0.04} layer in Pd{sub 0.96}Fe{sub 0.04}/CoO/Co/Al{sub 2}O{sub 3} thin-film heterostructure is absent and the exchange-spring effect in this system is not manifested. In the case of a Pd{sub 0.96}Fe{sub 0.04}/Co/CoO/Al{sub 2}O{sub 3} structure, it is shown that, according to the results of magnetometric measurements, the inversion of the order of antiferromagnetic and ferromagnetic layers leads to pinning of the magnetic moment of Pd{sub 0.96}Fe{sub 0.04} layer at the interface with cobalt and to realization of the exchange-spring effect. Additional evidence in favor of this interpretation was obtained using the micromagnetic modeling of magnetic hysteresis loops.
- OSTI ID:
- 22929277
- Journal Information:
- Technical Physics Letters, Vol. 45, Issue 4; Other Information: Copyright (c) 2019 Pleiades Publishing, Ltd.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7850
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ALUMINIUM OXIDES
ANISOTROPY
ANTIFERROMAGNETISM
COBALT OXIDES
FERROMAGNETIC MATERIALS
HYSTERESIS
MAGNETIC MOMENTS
MAGNETRONS
MOLECULAR BEAM EPITAXY
MONOCRYSTALS
PALLADIUM COMPOUNDS
PRESSURE RANGE BELOW 1 NANO PA
SAPPHIRE
SIMULATION
SPUTTERING
TEMPERATURE RANGE 0065-0273 K
THIN FILMS
VACUUM SYSTEMS