Journal
PHYSICAL REVIEW B
Volume 69, Issue 17, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevB.69.174418
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The 5d-electron-based BaIrO3 is a nonmetallic weak ferromagnet with a Curie temperature at T-C=175 K. Its greatly extended orbitals generate strong electron-lattice coupling, and the magnetism and electronic structure are thus critically linked to the lattice degree of freedom. Here we report results of our transport and magnetic study on slightly Sr-doped BaIrO3. It is found that dilute Sr doping drastically suppresses T-C, and instantaneously leads to a nonmetal-metal transition at high temperatures. All results highlight the instability of the ground state and the subtle relation between magnetic ordering and electron mobility. It is clear that BaIrO3 along with very few other systems represents a class of materials where the magnetic and transport properties can effectively be tuned by slight alterations in lattice parameters.
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