Chemical and physical pressure effects in the A-site spinel antiferromagnets CoM2O4 (M = Al, Co, and Rh)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F20%3A00538257" target="_blank" >RIV/68378271:_____/20:00538257 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/20:10412337

Výsledek na webu

<a href="http://hdl.handle.net/11104/0316096" target="_blank" >http://hdl.handle.net/11104/0316096</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/2053-1591/ab924f" target="_blank" >10.1088/2053-1591/ab924f</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Chemical and physical pressure effects in the A-site spinel antiferromagnets CoM2O4 (M = Al, Co, and Rh)

Popis výsledku v původním jazyce

Magnetic phase transitions under high pressure are reported for the diamond lattice antiferromagnet Co3-xRhxO4 in the range of 0 <= x <= 2.0, which is an isostructural S = 3/2 system for the well-known frustrated antiferromagnet CoAl2O4. In the Co3-xRhxO4 system, magnetic and specific-heat measurements at ambient pressure revealed that a second-order antiferromagnetic transition occurred at the Neel temperature (T-N) which exhibits a nonmonotonic x-variation. The physical pressure variations of T-N were determined by ac-calorimetry under hydrostatic pressures up to p = 2.6 GPa for Co2RhO4 and CoRh2O4. The rates of change of T-N with pressure (i.e., the pressure coefficients), 1.93 and 1.61 K GPa(-1), respectively, were comparable to those for CoAl2O4 and Co3O4, respectively. The pressure coefficients of magnetic ordering temperature for these A-site spinel compounds were considerably larger than those for other spinel and iron-garnet compounds which follow the empirical '10/3 law'. Simple analysis of the chemical and physical pressure coefficients of T-N revealed that T-N depended on both the lattice volume and the oxygen positional parameter u.

Název v anglickém jazyce

Chemical and physical pressure effects in the A-site spinel antiferromagnets CoM2O4 (M = Al, Co, and Rh)

Popis výsledku anglicky

Magnetic phase transitions under high pressure are reported for the diamond lattice antiferromagnet Co3-xRhxO4 in the range of 0 <= x <= 2.0, which is an isostructural S = 3/2 system for the well-known frustrated antiferromagnet CoAl2O4. In the Co3-xRhxO4 system, magnetic and specific-heat measurements at ambient pressure revealed that a second-order antiferromagnetic transition occurred at the Neel temperature (T-N) which exhibits a nonmonotonic x-variation. The physical pressure variations of T-N were determined by ac-calorimetry under hydrostatic pressures up to p = 2.6 GPa for Co2RhO4 and CoRh2O4. The rates of change of T-N with pressure (i.e., the pressure coefficients), 1.93 and 1.61 K GPa(-1), respectively, were comparable to those for CoAl2O4 and Co3O4, respectively. The pressure coefficients of magnetic ordering temperature for these A-site spinel compounds were considerably larger than those for other spinel and iron-garnet compounds which follow the empirical '10/3 law'. Simple analysis of the chemical and physical pressure coefficients of T-N revealed that T-N depended on both the lattice volume and the oxygen positional parameter u.

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

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2020

Kód důvěrnosti údajů

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

Název periodika

Materials Research Express

ISSN

2053-1591

e-ISSN

—

Svazek periodika

7

Číslo periodika v rámci svazku

5

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

14

Strana od-do

1-14

Kód UT WoS článku

000537091200001

EID výsledku v databázi Scopus

2-s2.0-85085366267