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ZhETF, Vol. 149, No. 6, p. 1208 (June 2016)
(English translation - JETP, Vol. 122, No. 6, p. 1047, June 2016 available online at )

Physical properties and phase diagram of the magnetic compound Cr0.26NbS1.74 at high pressures
Sidorov V.A., Petrova A.E., Pinyagin A.N., Kolesnikov N.N., Khasanov S.S., Stishov S.M.

Received: October 15, 2015

DOI: 10.7868/S0044451016060109

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We report a study of magnetic, electrical, and thermodynamic properties of a single crystal of the magnetic compound Cr0.26NbS1.74 at ambient and high pressures. Results of the measurements of magnetization as a function of temperature reveal the existence of a ferromagnetic phase transition in Cr0.26NbS1.74. The effective number of Bohr magnetons per Cr atom in the paramagnetic phase of Cr0.26NbS1.74 is \mu _{eff}\approx 4.6\mu _B, which matches the literature data for Cr1/3NbS2. Similarly, the effective number of Bohr magnetons per Cr atom in the saturation fields is rather close in both substances and corresponds to the number of magnetons in the Cr+3 ion. In contrast to the stoichiometric compound, Cr0.26NbS1.74 does not show a metamagnetic transition, that indicates the lack of a magnetic soliton. A high-pressure phase diagram of the compound reveals the quantum phase transition at T=0 and P\approx 4.2 GPa and the triple point situated at T\approx 20 K and P\approx 4.2 GPa.

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