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Title: New insulating antiferromagnetic quaternary iridates MLa 10Ir 4O 24 (M=Sr, Ba)

Abstract

Recently, oxides of Ir 4+ have received renewed attention in the condensed matter physics community, as it has been reported that certain iridates have a strongly spin-orbital coupled (SOC) electronic state, J eff = ½, that defines the electronic and magnetic properties. The canonical example is the Ruddlesden-Popper compound Sr 2IrO 4, which has been suggested as a potential route to a new class of high temperature superconductor due to the formal analogy between J eff = ½ and the S = ½ state of the cuprate superconductors. The quest for other iridium oxides that present tests of the underlying SOC physics is underway. In this spirit, here we report the synthesis and physical properties of two new quaternary tetravalent iridates, MLa 10Ir 4O 24 (M = Sr, Ba). The crystal structure of both compounds features isolated IrO 6 octahedra in which the electronic configuration of Ir is d 5. As a result, both compounds order antiferromagnetically despite the lack of obvious superexchange pathways, and resistivity measurement shows that SrLa 10Ir 4O 24 is an insulator.

Authors:
 [1];  [2];  [2];  [3];  [2];  [2]
  1. Argonne National Lab. (ANL), Argonne, IL (United States); Chinese Academy of Sciences, Shanghai (China)
  2. Argonne National Lab. (ANL), Argonne, IL (United States)
  3. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Chicago, Chicago, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1224999
Alternate Identifier(s):
OSTI ID: 1357034
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 5; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; electronic materials; structure of solids and liquids

Citation Formats

Zhao, Qingbiao, Han, Fei, Stoumpos, Constantinos C., Han, Tian -Heng, Li, Hao, and Mitchell, J. F. New insulating antiferromagnetic quaternary iridates MLa10Ir4O24 (M=Sr, Ba). United States: N. p., 2015. Web. doi:10.1038/srep11705.
Zhao, Qingbiao, Han, Fei, Stoumpos, Constantinos C., Han, Tian -Heng, Li, Hao, & Mitchell, J. F. New insulating antiferromagnetic quaternary iridates MLa10Ir4O24 (M=Sr, Ba). United States. doi:10.1038/srep11705.
Zhao, Qingbiao, Han, Fei, Stoumpos, Constantinos C., Han, Tian -Heng, Li, Hao, and Mitchell, J. F. Wed . "New insulating antiferromagnetic quaternary iridates MLa10Ir4O24 (M=Sr, Ba)". United States. doi:10.1038/srep11705. https://www.osti.gov/servlets/purl/1224999.
@article{osti_1224999,
title = {New insulating antiferromagnetic quaternary iridates MLa10Ir4O24 (M=Sr, Ba)},
author = {Zhao, Qingbiao and Han, Fei and Stoumpos, Constantinos C. and Han, Tian -Heng and Li, Hao and Mitchell, J. F.},
abstractNote = {Recently, oxides of Ir4+ have received renewed attention in the condensed matter physics community, as it has been reported that certain iridates have a strongly spin-orbital coupled (SOC) electronic state, Jeff = ½, that defines the electronic and magnetic properties. The canonical example is the Ruddlesden-Popper compound Sr2IrO4, which has been suggested as a potential route to a new class of high temperature superconductor due to the formal analogy between Jeff = ½ and the S = ½ state of the cuprate superconductors. The quest for other iridium oxides that present tests of the underlying SOC physics is underway. In this spirit, here we report the synthesis and physical properties of two new quaternary tetravalent iridates, MLa10Ir4O24 (M = Sr, Ba). The crystal structure of both compounds features isolated IrO6 octahedra in which the electronic configuration of Ir is d5. As a result, both compounds order antiferromagnetically despite the lack of obvious superexchange pathways, and resistivity measurement shows that SrLa10Ir4O24 is an insulator.},
doi = {10.1038/srep11705},
journal = {Scientific Reports},
issn = {2045-2322},
number = ,
volume = 5,
place = {United States},
year = {2015},
month = {7}
}

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