Antiferromagnetism and phase transitions in noncentrosymmetric UIrSi3

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10391724" target="_blank" >RIV/00216208:11320/18:10391724 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/18:00491094

Výsledek na webu

<a href="https://doi.org/10.1103/PhysRevB.97.144423" target="_blank" >https://doi.org/10.1103/PhysRevB.97.144423</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.97.144423" target="_blank" >10.1103/PhysRevB.97.144423</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Antiferromagnetism and phase transitions in noncentrosymmetric UIrSi3

Popis výsledku v původním jazyce

Magnetization and specific-heat measurements on a UIrSi3 single crystal reveal Ising-like antiferromagnetism below T-N = 41.7 K with the easy magnetization direction along the c axis of the tetragonal structure. The antiferromagnetic ordering is suppressed by magnetic fields &gt; H-c (mu H-0(c) = 7.3 T at 2 K) applied along the c axis. The first-order metamagnetic transition at H-c exhibits asymmetric hysteresis reflecting a slow reentry of the complex ground-state antiferromagnetic structure with decreasing field. The hysteresis narrows with increasing temperature and vanishes at 28 K. A second-order metamagnetic transition is observed at higher temperatures. The point of change of the order of transition in the established H-T magnetic phase diagram is considered as the tricritical point (at T-tc = 28 K and mu H-0(tc) = 5.8 T). The modified-Curie-Weiss law fits of temperature dependence of the a- and c-axis susceptibility provide opposite signs of Weiss temperatures, Theta(a)(p) similar to -51 K and Theta(c)(p) similar to + 38 K, respectively. This result and the small value of mu H-0(c) contrasting to the high T-N indicate competing ferromagnetic and antiferromagnetic interactions responsible for the complex antiferromagnetic ground state. The simultaneous electronic-structure calculations focused on the total energy of ferromagnetic and various antiferromagnetic states, the U magnetic moment, and magnetocrystalline anisotropy provide results consistent with experimental findings and the suggested physical picture of the system.

Název v anglickém jazyce

Antiferromagnetism and phase transitions in noncentrosymmetric UIrSi3

Popis výsledku anglicky

Magnetization and specific-heat measurements on a UIrSi3 single crystal reveal Ising-like antiferromagnetism below T-N = 41.7 K with the easy magnetization direction along the c axis of the tetragonal structure. The antiferromagnetic ordering is suppressed by magnetic fields &gt; H-c (mu H-0(c) = 7.3 T at 2 K) applied along the c axis. The first-order metamagnetic transition at H-c exhibits asymmetric hysteresis reflecting a slow reentry of the complex ground-state antiferromagnetic structure with decreasing field. The hysteresis narrows with increasing temperature and vanishes at 28 K. A second-order metamagnetic transition is observed at higher temperatures. The point of change of the order of transition in the established H-T magnetic phase diagram is considered as the tricritical point (at T-tc = 28 K and mu H-0(tc) = 5.8 T). The modified-Curie-Weiss law fits of temperature dependence of the a- and c-axis susceptibility provide opposite signs of Weiss temperatures, Theta(a)(p) similar to -51 K and Theta(c)(p) similar to + 38 K, respectively. This result and the small value of mu H-0(c) contrasting to the high T-N indicate competing ferromagnetic and antiferromagnetic interactions responsible for the complex antiferromagnetic ground state. The simultaneous electronic-structure calculations focused on the total energy of ferromagnetic and various antiferromagnetic states, the U magnetic moment, and magnetocrystalline anisotropy provide results consistent with experimental findings and the suggested physical picture of the system.

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

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

Kód důvěrnosti údajů

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

Název periodika

Physical Review B

ISSN

2469-9950

e-ISSN

—

Svazek periodika

97

Číslo periodika v rámci svazku

14

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

8

Strana od-do

—

Kód UT WoS článku

000431975200006

EID výsledku v databázi Scopus

2-s2.0-85046834989