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Free keywords:
Antiferromagnetism, Ferromagnetism, Magnetic moments, Manganese, Manganese alloys, Manganese oxide, Manganites, Semiconducting manganese compounds, Spin dynamics, X ray absorption spectroscopy, Antiferromagnetic transition, Antiferromagnetics, Applied magnetic fields, Double perovskite oxide, Exchange fields, Lows-temperatures, Property, Spectroscopic studies, Transition metal ions, X-ray absorptions, Magnetoresistance
Abstract:
By means of X-ray absorption spectroscopic studies, both experimentally and theoretically, we investigated the magnetic properties of the transition-metal-only double perovskite oxide Mn2CoReO6, which experiences an antiferromagnetic transition at TN = 93 K, whereas it holds a considerable net moment at low temperature. Internal exchange fields against the applied magnetic field for all the transition metal ions were identified, providing a microscopic insight into the intrasite antiferromagnetic couplings. Nevertheless, parallelly oriented canted spins of the Mn, Co, and Re cations were observed. In particularly, the Mn and Co cations hold considerable canting moments, which can be ascribed to the competition between the ferromagnetic intersite and antiferromagnetic intrasite magnetic interactions. Moreover, a spin-valve-type magnetoresistance was observed below the TN. The concurrence of the magnetoresistance effect and the antiferromagnetic semiconductive nature make Mn2CoReO6 a promising candidate for high-speed and energy-saving spintronics applications. © 2024 American Chemical Society.
