Skip navigation

Please use this identifier to cite or link to this item:
Title: Study of the structure, magnetic, thermal and electrical characterisation of ZnCr2Se4: Ta single crystals obtained by chemical vapour transport
Authors: Jendrzejewska, Izabela
Groń, Tadeusz
Kwapuliński, Piotr
Kusz, Joachim
Pietrasik, Ewa
Goryczka, Tomasz
Sawicki, Bogdan
Ślebarski, Andrzej
Fijałkowski, Marcin
Jampilek, Josef
Duda, Henryk
Keywords: single crystals; semiconductors; antiferromagnetic; specific heat
Issue Date: 2021
Citation: "Materials" (2021), iss. 11, art. no. 2749, s. 1-15
Abstract: The new series of single-crystalline chromium selenides, Ta-doped ZnCr2Se4, was synthesised by a chemical vapour transport method to determine the impact of a dopant on the structural and thermodynamic properties of the parent compound. We present comprehensive investigations of structural, electrical transport, magnetic, and specific heat properties. It was expected that a partial replacement of Cr ions by a more significant Ta one would lead to a change in direct magnetic interactions between Cr magnetic moments and result in a change in the magnetic ground state and electric transport properties of the ZnCr2􀀀xTaxSe4 (x = 0.05, 0.06, 0.07, 0.08, 0.1, 0.12) system. We found that all the elements of the cubic system had a cubic spinel structure; however, the doping gain linearly increased the ZnCr2􀀀xTaxSe4 unit cell volume. Doping with tantalum did not significantly change the semiconductor and magnetic properties of ZnCr2Se4. For all studied samples (0 x 0.12), an antiferromagnetic order (AFM) below TN~22 K was observed. However, a small amount of Ta significantly reduced the second critical field (Hc2) from 65 kOe for x = 0.0 (ZnCr2Se4 matrix) up to 42.2 kOe for x = 0.12, above which the spin helical system changed to ferromagnetic (FM). The Hc2 reduction can lead to strong competition among AFM and FM interactions and spin frustration, as the specific heat under magnetic fields H < Hc2 shows a strong field decrease in TN.
DOI: 10.3390/ma14112749
ISSN: 1996-1944
Appears in Collections:Artykuły (WNŚiT)

Files in This Item:
File Description SizeFormat 
Jendrzejewska_Gron_study_of_the_structure.pdf1,4 MBAdobe PDFView/Open
Show full item record

Uznanie Autorstwa 3.0 Polska Creative Commons License Creative Commons