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Volume 25
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This is an early access version, the complete PDF, HTML, and XML versions will be available soon.
Article

Effect of Ho3+ Substitution on Magnetic Properties of ZnCr2Se4

by
Izabela Jendrzejewska
1,*,
Tadeusz Groń
2,
Elżbieta Tomaszewicz
3,*,
Zbigniew Stokłosa
4,
Tomasz Goryczka
4,
Jerzy Goraus
2,
Michał Pilch
2,
Ewa Pietrasik
1 and
Beata Witkowska-Kita
5
1
Institute of Chemistry, University of Silesia in Katowice, 40-007 Katowice, Poland
2
A. Chełkowski Institute of Physics, University of Silesia in Katowice, 40-007 Katowice, Poland
3
Faculty of Chemical Technology and Engineering, West Pomeranian University of Technology, 70-310 Szczecin, Poland
4
Institute of Materials Science, University of Silesia in Katowice, 40-007 Katowice, Poland
5
Research Network Łukasiewicz—Institute of Mechanised Construction and Rock Mining, Katowice Branch, 02-673 Warszawa, Poland
*
Authors to whom correspondence should be addressed.
Int. J. Mol. Sci. 2024, 25(14), 7918; https://doi.org/10.3390/ijms25147918
Submission received: 25 June 2024 / Revised: 15 July 2024 / Accepted: 16 July 2024 / Published: 19 July 2024
(This article belongs to the Special Issue Magnetic Materials: Their Synthesis, Properties and Various Applications)
Versions Notes

Abstract

A series of ZnCr2−xHoxSe4 microcrystalline spinels (where x = 0.05, 0.075, and 0.10) containing holmium ions in octahedral coordination were obtained by sintering of adequate reactants at high temperatures. The obtained doped materials were characterized by X-ray diffraction, Scanning Electron Microscopy, UV–Vis–NIR, molecular field approximation, and XPS spectroscopies. Their thermal properties were also investigated. The doping of the ZnCr2S4 matrix with paramagnetic Ho3+ ions with a content of not more than 0.1 and a screened 4f shell revealed a significant effect of orbital and Landau diamagnetism, a strong reduction in short-range ferromagnetic interactions, and a broadening and shift of the peak of the first critical field by simultaneous stabilization of the sharp peak in the second critical field. These results correlate well with FPLO calculations, which show that Cr sites have magnetic moments of 3.19 µB and Ho sites have significantly larger ones with a value of 3.95 µB. Zn has a negligible magnetic polarization of 0.02 µB, and Se induces a polarization of approximately −0.12 µB.
Keywords: doped spinels; holmium ions; high-temperature powder sintering; magnetic characterization; specific heat; critical fields doped spinels; holmium ions; high-temperature powder sintering; magnetic characterization; specific heat; critical fields

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MDPI and ACS Style

Jendrzejewska, I.; Groń, T.; Tomaszewicz, E.; Stokłosa, Z.; Goryczka, T.; Goraus, J.; Pilch, M.; Pietrasik, E.; Witkowska-Kita, B. Effect of Ho3+ Substitution on Magnetic Properties of ZnCr2Se4. Int. J. Mol. Sci. 2024, 25, 7918. https://doi.org/10.3390/ijms25147918

AMA Style

Jendrzejewska I, Groń T, Tomaszewicz E, Stokłosa Z, Goryczka T, Goraus J, Pilch M, Pietrasik E, Witkowska-Kita B. Effect of Ho3+ Substitution on Magnetic Properties of ZnCr2Se4. International Journal of Molecular Sciences. 2024; 25(14):7918. https://doi.org/10.3390/ijms25147918

Chicago/Turabian Style

Jendrzejewska, Izabela, Tadeusz Groń, Elżbieta Tomaszewicz, Zbigniew Stokłosa, Tomasz Goryczka, Jerzy Goraus, Michał Pilch, Ewa Pietrasik, and Beata Witkowska-Kita. 2024. "Effect of Ho3+ Substitution on Magnetic Properties of ZnCr2Se4" International Journal of Molecular Sciences 25, no. 14: 7918. https://doi.org/10.3390/ijms25147918

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