Investigation of temperature-dependent structural and magnetic phase transitions in CrCl3 nanocrystals

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F25%3A00635747" target="_blank" >RIV/61388955:_____/25:00635747 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/25:10497687

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0925838825020298?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0925838825020298?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2025.180468" target="_blank" >10.1016/j.jallcom.2025.180468</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Investigation of temperature-dependent structural and magnetic phase transitions in CrCl3 nanocrystals

Popis výsledku v původním jazyce

We investigated the structural, vibrational, and magnetic properties of CrCl3 plate-like nanocrystals on Si/SiO2 substrates, synthesized via vapor transport, across a broad temperature range (2-300 K) to elucidate structural and magnetic phase transitions. X-ray diffraction analysis identified rhombohedral and monoclinic phases, with temperature-variable ratio. Unexpectedly, the high-temperature (monoclinic) phase persisted in coexistence with the low-temperature (rhombohedral) phase down to the lowest accessed temperature. Magnetic susceptibility measurements under different magnetic field orientations (B||c and Bic) showed distinct features at 14 K and 17 K, confirming a two-step magnetic ordering. Polarization-resolved Raman spectroscopy under varying temperature revealed significant changes in the peak positions, full-width at half maximum (FWHM), and intensity ratios, which was consistent with the proposed structural and magnetic phase transitions. Analysis of the polarization ratio highlighted anisotropic contributions linked to the structural phase transitions, showing a gradual transformation from the rhombohedral to the monoclinic phase with temperature, as corroborated by the X-ray diffraction study. The observed temperature dependence of the structural, magnetic and vibrational properties underscores the interplay between structural phase transitions and spin-lattice coupling in CrCl3. In particular, the high temperature phase persists far below the magnetic ordering temperature in the nanocrystals (the ratio of the monoclinic to the rhombohedral phase below 10 K is still about 2:3, as revealed by the X-ray diffraction analysis). Our findings offer a comprehensive understanding of the structural-magnetic correlation in CrCl3 and point to the possibility of the phase coexistence in the chromium trihalides in the form of plate-like nanocrystals.

Název v anglickém jazyce

Investigation of temperature-dependent structural and magnetic phase transitions in CrCl3 nanocrystals

Popis výsledku anglicky

We investigated the structural, vibrational, and magnetic properties of CrCl3 plate-like nanocrystals on Si/SiO2 substrates, synthesized via vapor transport, across a broad temperature range (2-300 K) to elucidate structural and magnetic phase transitions. X-ray diffraction analysis identified rhombohedral and monoclinic phases, with temperature-variable ratio. Unexpectedly, the high-temperature (monoclinic) phase persisted in coexistence with the low-temperature (rhombohedral) phase down to the lowest accessed temperature. Magnetic susceptibility measurements under different magnetic field orientations (B||c and Bic) showed distinct features at 14 K and 17 K, confirming a two-step magnetic ordering. Polarization-resolved Raman spectroscopy under varying temperature revealed significant changes in the peak positions, full-width at half maximum (FWHM), and intensity ratios, which was consistent with the proposed structural and magnetic phase transitions. Analysis of the polarization ratio highlighted anisotropic contributions linked to the structural phase transitions, showing a gradual transformation from the rhombohedral to the monoclinic phase with temperature, as corroborated by the X-ray diffraction study. The observed temperature dependence of the structural, magnetic and vibrational properties underscores the interplay between structural phase transitions and spin-lattice coupling in CrCl3. In particular, the high temperature phase persists far below the magnetic ordering temperature in the nanocrystals (the ratio of the monoclinic to the rhombohedral phase below 10 K is still about 2:3, as revealed by the X-ray diffraction analysis). Our findings offer a comprehensive understanding of the structural-magnetic correlation in CrCl3 and point to the possibility of the phase coexistence in the chromium trihalides in the form of plate-like nanocrystals.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

1873-4669

Svazek periodika

1027

Číslo periodika v rámci svazku

MAY 2025

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

7

Strana od-do

180468

Kód UT WoS článku

001479779500001

EID výsledku v databázi Scopus

2-s2.0-105003202257