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Title: Different response of transport and magnetic properties of BaIrO 3 to chemical and physical pressure

Abstract

A combination of x-ray absorption, x-ray-diffraction, and transport measurements at high pressure is used to investigate the interplay between the electronic properties of Ir 5d states and lattice degrees of freedom in the weakly ferromagnetic insulator BaIrO3. Although the Ir 5d local magnetic moment is highly stable against lattice compression, remaining nearly unperturbed to at least 30 GPa, the weak ferromagnetism (net ordered moment) is quickly quenched by 4.5 GPa (3% volume reduction). Under chemical pressure, where Sr is substituted for the larger Ba in BaIrO3, the local magnetic moment on Ir remains stable, but the weak ferromagnetism is quenched after only 1.7% volume reduction. The magnetic ordering temperature Tm is also more strongly suppressed by chemical pressure compared to physical pressure. In addition, under ~23-at.% Sr doping, BaIrO3 undergoes a transition to a paramagnetic metallic state. Resistivity measurements indicate that BaIrO3 remains an electrical insulator to at least 9 GPa, a much higher pressure than required to quench the weak ferromagnetism (~4.5 GPa). Such a disparate response of transport and magnetic properties to chemical and physical pressure is likely rooted in the different compression rates of the (a,c) lattice parameters with Sr doping and applied pressure and the effectmore » of related lattice distortions on electronic bandwidth and exchange interactions in this strongly spin-orbit-coupled system.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1392406
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Physical Review. B, Condensed Matter and Materials Physics
Additional Journal Information:
Journal Volume: 90; Journal Issue: 1; Journal ID: ISSN 1098-0121
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English

Citation Formats

Laguna-Marco, M. A., Fabbris, G., Souza-Neto, N. M., Chikara, S., Schilling, J. S., Cao, G., and Haskel, D. Different response of transport and magnetic properties of BaIrO3 to chemical and physical pressure. United States: N. p., 2014. Web. doi:10.1103/PhysRevB.90.014419.
Laguna-Marco, M. A., Fabbris, G., Souza-Neto, N. M., Chikara, S., Schilling, J. S., Cao, G., & Haskel, D. Different response of transport and magnetic properties of BaIrO3 to chemical and physical pressure. United States. doi:10.1103/PhysRevB.90.014419.
Laguna-Marco, M. A., Fabbris, G., Souza-Neto, N. M., Chikara, S., Schilling, J. S., Cao, G., and Haskel, D. Tue . "Different response of transport and magnetic properties of BaIrO3 to chemical and physical pressure". United States. doi:10.1103/PhysRevB.90.014419.
@article{osti_1392406,
title = {Different response of transport and magnetic properties of BaIrO3 to chemical and physical pressure},
author = {Laguna-Marco, M. A. and Fabbris, G. and Souza-Neto, N. M. and Chikara, S. and Schilling, J. S. and Cao, G. and Haskel, D.},
abstractNote = {A combination of x-ray absorption, x-ray-diffraction, and transport measurements at high pressure is used to investigate the interplay between the electronic properties of Ir 5d states and lattice degrees of freedom in the weakly ferromagnetic insulator BaIrO3. Although the Ir 5d local magnetic moment is highly stable against lattice compression, remaining nearly unperturbed to at least 30 GPa, the weak ferromagnetism (net ordered moment) is quickly quenched by 4.5 GPa (3% volume reduction). Under chemical pressure, where Sr is substituted for the larger Ba in BaIrO3, the local magnetic moment on Ir remains stable, but the weak ferromagnetism is quenched after only 1.7% volume reduction. The magnetic ordering temperature Tm is also more strongly suppressed by chemical pressure compared to physical pressure. In addition, under ~23-at.% Sr doping, BaIrO3 undergoes a transition to a paramagnetic metallic state. Resistivity measurements indicate that BaIrO3 remains an electrical insulator to at least 9 GPa, a much higher pressure than required to quench the weak ferromagnetism (~4.5 GPa). Such a disparate response of transport and magnetic properties to chemical and physical pressure is likely rooted in the different compression rates of the (a,c) lattice parameters with Sr doping and applied pressure and the effect of related lattice distortions on electronic bandwidth and exchange interactions in this strongly spin-orbit-coupled system.},
doi = {10.1103/PhysRevB.90.014419},
journal = {Physical Review. B, Condensed Matter and Materials Physics},
issn = {1098-0121},
number = 1,
volume = 90,
place = {United States},
year = {2014},
month = {7}
}

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