Superconductivity in the YIr2Si2 and LaIr2Si2 Polymorphs

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F12%3A10126105" target="_blank" >RIV/00216208:11320/12:10126105 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1143/JPSJ.81.104715" target="_blank" >http://dx.doi.org/10.1143/JPSJ.81.104715</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1143/JPSJ.81.104715" target="_blank" >10.1143/JPSJ.81.104715</a>

Result language

angličtina

Original language name

Superconductivity in the YIr2Si2 and LaIr2Si2 Polymorphs

Original language description

We report on the existence of superconductivity in YIr2Si2 and LaIr2Si2 compounds in relation to the crystal structure. The two compounds crystallize in two structural polymorphs, both tetragonal. The high-temperature polymorph (HTP) is of the CaBe2Ge2 structure type (space group P4/nmm), while the low-temperature polymorph (LTP) is of the ThCr2Si2 structure type (I4/mmm). By studying the polycrystals prepared by arc melting, we observed that the rapidly cooled samples retain the HTP even at room temperature (RT) and below. Annealing such samples at }= 900 degrees C followed by slow cooling to RT provides the LTP. Both the HTP and LTP were subsequently studied with respect to magnetism and superconductivity by electrical resistivity, magnetization, ACsusceptibility, and specific heat measurements. The HTP and LTP of both compounds behave as Pauli paramagnets. Superconductivity was found exclusively in the HTP of both compounds below T-SC (= 2.52 K in YIr2Si2 and 1.24 K in LaIr2Si2). T

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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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)<br>S - Specificky vyzkum na vysokych skolach

Publication year

2012

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Journal of the Physical Society of Japan

ISSN

0031-9015

e-ISSN

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Volume of the periodical

81

Issue of the periodical within the volume

10

Country of publishing house

JP - JAPAN

Number of pages

9

Pages from-to

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UT code for WoS article

000309342700040

EID of the result in the Scopus database

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