Temperature dependence of the magnetic susceptibility of nanocomposites with particles of lithium-cobalt and lithium-cobalt-nickel orthophosphates

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Abstract

The magnetic susceptibility of nanocomposites with particles of lithium-cobalt and lithium-cobalt-nickel orthophosphates in constant and alternating magnetic fields has been studied. Temperature dependences of susceptibility as well as magnetization curves are measured. It is shown that the temperature dependence of a composite with LiNi0.5Co0.5PO4 particles has one maximum at a temperature of TN = 13.5 K, and a state with an incommensurable non-collinear magnetic ordering is not realized. In contrast, a nanocomposite with LiCoPO4 particles has two maxima at temperatures TN = 31.1 K and Tmax= 21.9 K. Below the temperature TN, antiferromagnetic ordering is realized in both nanocomposites.

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A. B. Rinkevich

M.N. Miheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Author for correspondence.
Email: rin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108

O. V. Nemytova

M.N. Miheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: rin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108

D. V. Perov

M.N. Miheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: rin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108

M. S. Stenina

M.N. Miheev Institute of Metal Physics, Ural Branch, Russian Academy of Sciences

Email: rin@imp.uran.ru
Russian Federation, Ekaterinburg, 620108

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Supplementary files

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2. Fig. 1. The structure of samples No. 1 (a), 2 (b), 3 (c), obtained by scanning microscopy.

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3. Fig. 2. Magnetization curves of samples No. 1 (a), 2 (b), 3 (c), measured at several temperatures.

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4. Fig. 3. Temperature dependence of magnetization in nanocomposite sample No. 1 with LiNi0.5Co0.5PO4 particles: field H=100 Oe (a); field H=3 kOe (b); temperature dependence of inverse susceptibility (c).

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5. Fig. 4. Temperature dependence of magnetic susceptibility of sample No. 1 in an alternating field with a frequency of f = 80 Hz and H~=4 Oe.

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6. Fig. 5. Temperature dependence of magnetic susceptibility of sample No. 2 of nanocomposite with LiCoPO4 particles (a) and magnetization curves of sample 2 at several temperatures (b).

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7. Fig. 6. Temperature dependence of the magnetic susceptibility of sample No. 2 of the nanocomposite with LiCoPO4 particles, measured in alternating fields with a frequency of 1 Hz and 1 kHz at an alternating field amplitude of H~ = 4 Oe.

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8. Fig. 7. Temperature dependences of the magnetic susceptibility of sample No. 3 of the nanocomposite with LiCoPO4 particles, measured in constant (DC — direct current) and alternating (AC — alternating current) fields (a); temperature dependence of the inverse susceptibility measured in a constant field H = 1 kOe (b).

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9. Fig. 8. Frequency dependences of the real part of the magnetic susceptibility of sample No. 2 of the nanocomposite with LiCoPO4 particles, measured in alternating fields at several temperatures.

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10. Fig. 9. Approximation of the frequency dependence of the real part of the magnetic susceptibility of sample No. 2 of the nanocomposite with LiCoPO4 particles at T = 4 K, performed according to formula (2).

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