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arXiv · 1702.06551

Half-metallic ferromagnetism in Sr$_3$Ru$_2$O$_7$

Pablo Rivero·Vincent Meunier·William Shelton
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Abstract

The bilayered member of the Ruddesden-Popper family of ruthenates, Sr$_3$Ru$_2$O$_7$, has received an increasing attention due to its interesting properties and phases. By using first principle calculations we find that the ground-state is characterized by a ferromagnetic (FM) half-metallic state. This state strongly competes with an antiferromagnetic metallic phase, which indicates the possible presence of a particular state characterized by the existence of different magnetic domains. To drive the system towards a phase transition we studied the electronic and magnetic properties as a function of RuO$_6$ octahedra rotations and found that the magnetic phase does not couple with the rotation angle. Our results provide accurate electronic, structure, and magnetic ground-state properties of Sr$_3$Ru$_2$O$_7$ and stimulate the investigation of other type of octahedra rotations and distortions in the search of phase transitions.

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Pablo Rivero, Vincent Meunier, William Shelton. 2017-02-21. Half-metallic ferromagnetism in Sr$_3$Ru$_2$O$_7$. https://doi.org/10.1103/physrevb.95.195106

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