Conductive properties of heavy-rare-earth A2Ir2O7 iridates synthesized by the CsCl-flux method
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10468619" target="_blank" >RIV/00216208:11320/23:10468619 - isvavai.cz</a>
Result on the web
<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=5D.LvvK1hb" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=5D.LvvK1hb</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.jpcs.2023.111268" target="_blank" >10.1016/j.jpcs.2023.111268</a>
Alternative languages
Result language
angličtina
Original language name
Conductive properties of heavy-rare-earth A2Ir2O7 iridates synthesized by the CsCl-flux method
Original language description
The A2Ir2O7 pyrochlores with A = rare-earth element have been the subject of intense scientific interest for their complex magnetic and conductive properties. The previous studies focused mainly on the light A members of the series. We report on the electrical resistivity and magnetoresistance of the heavy-rare-earth iridates (A = Dy -Lu), including newly synthesized Tm2Ir2O7 member. The measurements were performed on pelletized powder samples synthesized using the CsCl-flux. The transition from the semimetal/semiconductor to the insulating state is followed within the series. Related anomaly in electrical resistivity continuously broadens coming from A = Dy to Lu. Electrical resistivity increases by several orders (up to 6) of magnitude with decreasing temperature down to 2 K. The nature of the transition to the insulating state was discussed in the frame of various models, leaning towards the Slater mechanism without Brillouin zone-folding. Investigated iridates become insulating due to an opening of a gap at the Fermi level induced by the antiferromagnetic ordering. A negative magnetoresistance was observed for all members of the series. The highest resistivity drop to 8% of the zero-field value was revealed for Dy2Ir2O7. Ferromagnetic Ir domain walls between antiferromagnetic domains were discussed to influence the measured quantities for A2Ir2O7 iridates.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2023
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Physics and Chemistry of Solids
ISSN
0022-3697
e-ISSN
1879-2553
Volume of the periodical
176
Issue of the periodical within the volume
květen
Country of publishing house
US - UNITED STATES
Number of pages
7
Pages from-to
111268
UT code for WoS article
000965670400001
EID of the result in the Scopus database
2-s2.0-85147844465