Robust intralayer antiferromagnetism and tricriticality in the van der Waals compound VBr3

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F23%3A10469459" target="_blank" >RIV/00216208:11320/23:10469459 - isvavai.cz</a>

Alternative codes found

RIV/00216208:11310/23:10469459

Result on the web

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=_c0t7AHJzw" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=_c0t7AHJzw</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevB.108.104416" target="_blank" >10.1103/PhysRevB.108.104416</a>

Result language

angličtina

Original language name

Robust intralayer antiferromagnetism and tricriticality in the van der Waals compound VBr3

Original language description

We studied magnetic states and phase transitions in the van der Waals antiferromagnet VBr3 experimentally by specific heat and magnetization measurements of single crystals in high magnetic fields and theoretically by the density functional theory calculations focused on exchange interactions. The magnetization behavior mimics Ising antiferromagnets with magnetic moments pointing out-of-plane due to strong uniaxial magnetocrystalline anisotropy. The out-of-plane magnetic field induces a spin-flip metamagnetic transition of first-order type at low temperatures, while at higher temperatures, the transition becomes continuous. The first-order and continuous transition segments in the field-temperature phase diagram meet at a tricritical point. The magnetization response to the in-plane field manifests a continuous spin canting which is completed at the anisotropy field μ(0)H(MA) = 27T. At higher fields, the two magnetization curves above saturate at the same value of magnetic moment μ(sat) = 1.2μ(B)/f.u., which is much smaller than the spin-only (S=1) moment of the V(3+) ion. The reduced moment can be explained by the existence of an unquenched orbital magnetic moment antiparallel to the spin. The orbital moment is a key ingredient of a mechanism responsible for the observed large anisotropy. The exact energy evaluation of possible magnetic structures shows that the intralayer zigzag antiferromagnetic (AFM) order is preferred, which renders the AFM ground state significantly more stable against the spin-flip transition than the other options. The calculations also predict that a minimal distortion of the Br ion sublattice causes a radical change of the orbital occupation in the ground state, connected with the formation of the orbital moment and the stability of magnetic order.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

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

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2023

Confidentiality

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

Name of the periodical

Physical Review B

ISSN

2469-9950

e-ISSN

2469-9969

Volume of the periodical

108

Issue of the periodical within the volume

10

Country of publishing house

US - UNITED STATES

Number of pages

10

Pages from-to

104416

UT code for WoS article

001107723400002

EID of the result in the Scopus database

2-s2.0-85172682388