First-order transition under a magnetic ordered state in SmPtSi2

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F24%3A10483749" target="_blank" >RIV/00216208:11320/24:10483749 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=4BtOLIE._e" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=4BtOLIE._e</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1402-4896/ad59e0" target="_blank" >10.1088/1402-4896/ad59e0</a>

Jazyk výsledku

angličtina

Název v původním jazyce

First-order transition under a magnetic ordered state in SmPtSi2

Popis výsledku v původním jazyce

We have synthesized polycrystalline and single-crystalline samples of SmPtSi2, and measured their resistivity, specific heat, magnetization, and Seebeck coefficient. The existence of two magnetic phase transitions has been confirmed, one at T-H = 8.6 K and the other T-L = 5.6 K. A hump-type anomaly in resistivity, a lambda-type anomaly in specific heat, a downward bend in magnetization, and a semiconductor-like increase in the Seebeck coefficient were observed at T-H, indicating an antiferromagnetic transition accompanied by a gap opening on the Fermi surface. In contrast, a sharp drop in resistivity, a sharp spike in specific heat, and a drop in magnetization were observed at T-L. The Seebeck coefficient showed metallic temperature dependence below T-L. With increasing pressure, T-H and T-L shifted to higher temperatures. The transition at T-L was no longer observed at pressures above 1.5 GPa. These findings suggest that the transition at T-L is a transition from an antiferromagnetic ordered state with the gap on the Fermi surface to a different antiferromagnetic state.

Název v anglickém jazyce

First-order transition under a magnetic ordered state in SmPtSi2

Popis výsledku anglicky

We have synthesized polycrystalline and single-crystalline samples of SmPtSi2, and measured their resistivity, specific heat, magnetization, and Seebeck coefficient. The existence of two magnetic phase transitions has been confirmed, one at T-H = 8.6 K and the other T-L = 5.6 K. A hump-type anomaly in resistivity, a lambda-type anomaly in specific heat, a downward bend in magnetization, and a semiconductor-like increase in the Seebeck coefficient were observed at T-H, indicating an antiferromagnetic transition accompanied by a gap opening on the Fermi surface. In contrast, a sharp drop in resistivity, a sharp spike in specific heat, and a drop in magnetization were observed at T-L. The Seebeck coefficient showed metallic temperature dependence below T-L. With increasing pressure, T-H and T-L shifted to higher temperatures. The transition at T-L was no longer observed at pressures above 1.5 GPa. These findings suggest that the transition at T-L is a transition from an antiferromagnetic ordered state with the gap on the Fermi surface to a different antiferromagnetic state.

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/LM2023065" target="_blank" >LM2023065: 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

2024

Kód důvěrnosti údajů

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

Název periodika

Physica Scripta

ISSN

0031-8949

e-ISSN

1402-4896

Svazek periodika

99

Číslo periodika v rámci svazku

8

Stát vydavatele periodika

SE - Švédské království

Počet stran výsledku

7

Strana od-do

085923

Kód UT WoS článku

001263257200001

EID výsledku v databázi Scopus

2-s2.0-85198022585