TY - JOUR

T1 - An ultra-high-entropy rare earth orthoferrite (UHE REO): solution combustion synthesis, structural features and ferrimagnetic behavior

AU - Bui, Long M.

AU - Cam, Son T.

AU - Buryanenko, Ivan V.

AU - Semenov, Valentin G.

AU - Nazarov, Denis V.

AU - Kazin, Pavel E.

AU - Nevedomskiy, Vladimir N.

AU - Gerasimov, Evgeny Y.

AU - Popkov, Vadim I.

PY - 2023/3/17

Y1 - 2023/3/17

N2 - A novel ultra-high-entropy rare earth orthoferrite (UHE REO) of Sc1/16Y1/16La1/16Ce1/16Pr1/16Nd1/16Sm1/16Eu1/16Gd1/16Tb1/16Dy1/16Ho1/16Er1/16Tm1/16Yb1/16Lu1/16FeO3 nominal composition was successfully synthesized for the first time through a simple and efficient solution combustion approach.PXRD, Raman, and 57Fe Mössbauer spectroscopy confirmed the high chemical and phase purity of the synthesized UHE REO (hereafter denoted as ΣREFeO3), which belonged to the Pnma space group, typical of theperovskite-like rare earth orthoferrites. Despite the fact that the main X-ray reflections, vibration modes, andspectral Mössbauer components unambiguously indicate the single-phase nature of the sample, the results ofSEM and TEM make it possible to establish the presence of a main (about 50 nm) and a minor ultrafine (about10 nm) fraction of ΣREFeO3 nanoparticles. The bimodal size distribution of nanoparticles was also reflected inthe magnetic behavior of this substance: the presence of several sextet components in the Mössbauerspectra, the hard single-domain magnetic nature of the main fraction of 50 nm UHE REO nanoparticles, andthe superparamagnetic state of the minor fraction of 10 nm UHE REO nanoparticles. Thus, the unusual features of nanostructured ΣREFeO3 can potentially be used for the creation of new generations of transformers,magnetic memory systems, magnetic screens, radio devices, etc

AB - A novel ultra-high-entropy rare earth orthoferrite (UHE REO) of Sc1/16Y1/16La1/16Ce1/16Pr1/16Nd1/16Sm1/16Eu1/16Gd1/16Tb1/16Dy1/16Ho1/16Er1/16Tm1/16Yb1/16Lu1/16FeO3 nominal composition was successfully synthesized for the first time through a simple and efficient solution combustion approach.PXRD, Raman, and 57Fe Mössbauer spectroscopy confirmed the high chemical and phase purity of the synthesized UHE REO (hereafter denoted as ΣREFeO3), which belonged to the Pnma space group, typical of theperovskite-like rare earth orthoferrites. Despite the fact that the main X-ray reflections, vibration modes, andspectral Mössbauer components unambiguously indicate the single-phase nature of the sample, the results ofSEM and TEM make it possible to establish the presence of a main (about 50 nm) and a minor ultrafine (about10 nm) fraction of ΣREFeO3 nanoparticles. The bimodal size distribution of nanoparticles was also reflected inthe magnetic behavior of this substance: the presence of several sextet components in the Mössbauerspectra, the hard single-domain magnetic nature of the main fraction of 50 nm UHE REO nanoparticles, andthe superparamagnetic state of the minor fraction of 10 nm UHE REO nanoparticles. Thus, the unusual features of nanostructured ΣREFeO3 can potentially be used for the creation of new generations of transformers,magnetic memory systems, magnetic screens, radio devices, etc

UR - https://www.mendeley.com/catalogue/81ea3c20-626a-307c-9818-2a50f0a2976d/

U2 - DOI: 10.1039/d2dt04103k

DO - DOI: 10.1039/d2dt04103k

M3 - Article

VL - 52

SP - 4779

EP - 4786

JO - Dalton Transactions

JF - Dalton Transactions

SN - 1477-9226

IS - 15

ER -