Uniaxial pressure induced half-metallic ferromagnetic phase transition in LaMnO${}_3$

Abstract

We use first-principles theory to predict that the application of uniaxial compressive strain leads to a transition from an antiferromagnetic insulator to a ferromagnetic half-metal phase in LaMnO${}_3$. We identify the Q2 Jahn-Teller mode as the primary mechanism that drives the transition, indicating that this mode can be used to tune the lattice, charge, and spin coupling. Applying $\simeq$ 6 GPa of uniaxial pressure along the [010] direction activates the transition to a half-metallic $\text{pseudo-cubic}$ state. The half-metallicity opens the possibility of producing colossal magnetoresistance in the stoichiometric LaMnO${}_3$ compound at significantly lower pressure compared to recently observed investigations using hydrostatic pressure.

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Cited by in corpus (9)

• Electron-Lattice Interplays in LaMnO3 from Canonical Jahn-Teller Distortion Notations
• Uniaxial strain control of bulk ferromagnetism in rare-earth titanates
• Half-metallic ferromagnetism in Sr${}_3$Ru${}_2$O${}_7$
• Pressure-induced insulator-metal transition in EuMnO3
• Persistent half-metallic ferromagnetism in a (111)-oriented manganite superlattice
• Decoupling the effects of geometry and nature of strain in LaMnO${}_3$: Interplay of dynamic correlations and uniaxial strain driving magnetic phase transitions
• Large magnetic anisotropy energy and robust half-metallic ferromagnetism in 2D MnXSe${}_4$ (X = As, Sb)
• Pbnm to R3-c phase transformation in (1-x)LaFeO3.xLaMnO3 solid solution due to modifications in structure, octahedral tilt and valence states of Fe-Mn
• Electronic and magnetic ground state of 4$d^3$ double perovskite ruthenates A${}_2$LaRuO${}_6$ (A $=$ Ca, Sr, Ba)