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Issue 23, 2018
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Ferromagnetic Cr2Te3 nanorods with ultrahigh coercivity

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Abstract

Ferromagnetic Cr2Te3 nanorods were synthesized by a one-pot high-temperature organic-solution-phase method. The crystalline phases and magnetic properties can be systematically tuned by varying the molar ratio of the Cr and Te precursors. A magnetically hard phase, identified as chemically ordered Cr2Te3, is the dominating one at the precursor ratio between Cr : Te = 1 : 1.2 and 1 : 1.8. A magnetically soft phase, attributed to chemical disorder due to composition inhomogeneity and stacking faults, is present under either Cr-rich or Te-rich synthesis conditions. A large coercivity of 9.6 kOe is obtained for a Cr : Te precursor ratio of 1 : 1.8, which is attributed to the large magnetocrystalline anisotropy of ordered Cr2Te3 nanorods, and verified by density-functional theory calculations. The hard and soft phases sharing coherent interfaces co-exist in a seemingly single-crystalline nanorod, showing an unusual transition from exchange-coupled behavior at higher temperatures to two-phase behavior as the temperature is lowered.

Graphical abstract: Ferromagnetic Cr2Te3 nanorods with ultrahigh coercivity

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Publication details

The article was received on 19 Mar 2018, accepted on 12 May 2018 and first published on 15 May 2018


Article type: Paper
DOI: 10.1039/C8NR02272K
Citation: Nanoscale, 2018,10, 11028-11033
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    Ferromagnetic Cr2Te3 nanorods with ultrahigh coercivity

    F. Wang, J. Du, F. Sun, R. F. Sabirianov, N. Al-Aqtash, D. Sengupta, H. Zeng and X. Xu, Nanoscale, 2018, 10, 11028
    DOI: 10.1039/C8NR02272K

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