TY - JOUR
T1 - Large Magnetocrystalline Anisotropy and Giant Coercivity in the Ferrimagnetic Double Perovskite Lu2NiIrO6
AU - Rout, Paresh Chandra
AU - Schwingenschlögl, Udo
N1 - KAUST Repository Item: Exported on 2021-11-24
Acknowledgements: The research reported in this publication was supported by funding from King Abdullah University of Science and Technology (KAUST).
PY - 2021/8/3
Y1 - 2021/8/3
N2 - We discover that large uniaxial magnetocrystalline anisotropy driven by the simultaneous presence of spin–orbit coupling and structural distortions is the origin of the giant coercivity observed experimentally in the double perovskite Lu2NiIrO6. The magnetic easy axis turns out to be the monoclinic b-axis with an anisotropy constant as high as 1.9 × 108 erg/cm3. The predicted coercive field of 50 kOe and Curie temperature of 220 K agree with the experimentally observed values and point to potential of Lu2NiIrO6 in spintronics applications. We find that the spin–orbit coupling induces a rare Ir4+Jeff = 1/2 Mott insulating state, suggesting that Lu2NiIrO6 provides a playground to study the interplay between spin–orbit coupling and electronic correlations in a 5d transition metal oxide. The spin–orbit coupling also results in a direct band gap with the valence and conduction states localized on different transition metal sublattices, i.e., efficient electron–hole separation upon photoexcitation and low electron–hole recombination.
AB - We discover that large uniaxial magnetocrystalline anisotropy driven by the simultaneous presence of spin–orbit coupling and structural distortions is the origin of the giant coercivity observed experimentally in the double perovskite Lu2NiIrO6. The magnetic easy axis turns out to be the monoclinic b-axis with an anisotropy constant as high as 1.9 × 108 erg/cm3. The predicted coercive field of 50 kOe and Curie temperature of 220 K agree with the experimentally observed values and point to potential of Lu2NiIrO6 in spintronics applications. We find that the spin–orbit coupling induces a rare Ir4+Jeff = 1/2 Mott insulating state, suggesting that Lu2NiIrO6 provides a playground to study the interplay between spin–orbit coupling and electronic correlations in a 5d transition metal oxide. The spin–orbit coupling also results in a direct band gap with the valence and conduction states localized on different transition metal sublattices, i.e., efficient electron–hole separation upon photoexcitation and low electron–hole recombination.
UR - http://hdl.handle.net/10754/670406
UR - https://pubs.acs.org/doi/10.1021/acs.nanolett.1c01450
UR - http://www.scopus.com/inward/record.url?scp=85113167898&partnerID=8YFLogxK
U2 - 10.1021/acs.nanolett.1c01450
DO - 10.1021/acs.nanolett.1c01450
M3 - Article
C2 - 34343007
SN - 1530-6984
VL - 21
SP - 6807
EP - 6812
JO - Nano Letters
JF - Nano Letters
IS - 16
ER -