La-Substitution Effects on Multisite Ce Compound CePtGe2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10446331" target="_blank" >RIV/00216208:11320/22:10446331 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=nRImCW9Od9" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=nRImCW9Od9</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.7566/JPSJ.91.074712" target="_blank" >10.7566/JPSJ.91.074712</a>

Jazyk výsledku

angličtina

Název v původním jazyce

La-Substitution Effects on Multisite Ce Compound CePtGe2

Popis výsledku v původním jazyce

The CePtGe2 compound, which shows antiferromagnetic transition at Neel temperature T-N = 3.8 K, has two crystallographically inequivalent Ce sites. Recently, the coexistence of a localized f-electron state at one of two Ce sites and an itinerant heavy f-electron state at the other Ce site has been suggested. In this study, we have prepared polycrystalline samples of (Ce1-xLax)PtGe2 (x = 0 similar to 0.2) and have measured their electrical resistivity and magnetization. The specific heat for x = 0.2 has been measured also. With increasing x, the downward bending of the temperature dependence of the resistivity and the cusp-type anomaly in the susceptibility associated with T-N shift to lower temperatures with a linear extrapolation of T-N directing to OK at x similar to 0.5. Also, the saturation magnetization decreases linearly with increasing x, pointing to the disappearance of magnetic moments at the same La concentration. These results indicate that only the Ce ions with the localized f-electron are substituted by La ions. On the other hand, the transition from the anti ferromagnetic state to the ferromagnetic-like polarized magnetic state at a very weak magnetic field, which is comparable to that of conventional Ferrite magnets, was realized via the La-substitution.

Název v anglickém jazyce

La-Substitution Effects on Multisite Ce Compound CePtGe2

Popis výsledku anglicky

The CePtGe2 compound, which shows antiferromagnetic transition at Neel temperature T-N = 3.8 K, has two crystallographically inequivalent Ce sites. Recently, the coexistence of a localized f-electron state at one of two Ce sites and an itinerant heavy f-electron state at the other Ce site has been suggested. In this study, we have prepared polycrystalline samples of (Ce1-xLax)PtGe2 (x = 0 similar to 0.2) and have measured their electrical resistivity and magnetization. The specific heat for x = 0.2 has been measured also. With increasing x, the downward bending of the temperature dependence of the resistivity and the cusp-type anomaly in the susceptibility associated with T-N shift to lower temperatures with a linear extrapolation of T-N directing to OK at x similar to 0.5. Also, the saturation magnetization decreases linearly with increasing x, pointing to the disappearance of magnetic moments at the same La concentration. These results indicate that only the Ce ions with the localized f-electron are substituted by La ions. On the other hand, the transition from the anti ferromagnetic state to the ferromagnetic-like polarized magnetic state at a very weak magnetic field, which is comparable to that of conventional Ferrite magnets, was realized via the La-substitution.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/LM2018096" target="_blank" >LM2018096: Laboratoř pro syntézu a měření materiálů</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Journal of the Physical Society of Japan

ISSN

0031-9015

e-ISSN

—

Svazek periodika

91

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

JP - Japonsko

Počet stran výsledku

4

Strana od-do

074712

Kód UT WoS článku

000827270800003

EID výsledku v databázi Scopus

2-s2.0-85133142522