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The magnetic properties of some magnetic materials are influenced by the exchange interaction between magnetic ions and the spin fluctuations of magnetic ions. By use of the exchange interaction-effective field including the spin fluctuations of magnetic ions Hm= n0(1+γ T +β eω T)M, the Zeeman splitting of crystal field energy levels of Pr3+ ions in PrNi2 and the variation of the magnetic moments with the applied field in a temperature range of 3.8 K≤ T ≤ 30 K are calculated. The thermal variation of the reciprocal susceptibility of Pr3+ ions is calculated as well for the applied magnetic field H=5000 Oe. The calculated results are in good agreement with the experimental data. The magnetic entropy changes are obtained theoretically in a magnetic field range of 0H<50000 Oe, and the results are similar to those reported in the literature. It is indicated that the exchange interaction-effective field containing the spin fluctuations is applicable not only to the ferrimagnetic crystals, but also to the paramagnets.
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Keywords:
- PrNi2 /
- magnetic specific heat /
- exchange interaction-effective field /
- magnetic moment /
- magnetic entropy change
[1] de Oliveira N A, von Ranke P J 2010 Phys. Reports 489 89
[2] Hu F, Zhang G Y, Huang Y J, Xia W S 2014 Chin. Phys. Lett. 31 057501
[3] von Ranke P J, No'brega E P, de Oliveira I G, Gomes A M, Sarthour R S 2010 Phys. Rev. B 63 184406
[4] Mori H, Satoh T, Fujita T, Ohtsuka T 1982 J. Low. Temp. Phys. 49 397
[5] Zhang G Y, Xia T, Xue L P, Zhang X L 2006 Phys. Lett. A 360 327
[6] Zhang G Y, Wei M, Xia W S, Yang G 2009 J. Magn. Magn. Mater. 321 3077
[7] Hu F, Zhang G Y, Yang D, Zhang X L, Xue L P, Zhang L 2013 Chin. Phys. Lett. 30 087803
[8] Javorshy P, Schaudy G, Holubar T, Hilscher G 1994 Solid State Commun. 91 259
[9] Andreeff A, Frauenheim TH, Goremychkin E A, Griessmann H, Lippold B, Matz W, Chistyakov O D, Savitskii E M 1982 Phys. Status Solidi B 111 507
[10] Melero J J, Burriel R, Ibarra M R 1995 J. Magn. Magn. Mater. 140-144 841
[11] Ibarra M R, Arnaudas J I, Algarabel P A, del Moral A 1984 J. Magn. Magn. Mater. 46 167
[12] Mori H, Satoh T, Suzuki H, Ohtsuka T 1982 J. Phys. Soc. Jpn. 51 1785
[13] Yang G, Zhang G Y, Gao J, Xue L P, Xia T, Zhang X L 2011 Chin. Phys. B 20 017802
[14] Zhang G Y, Xia T, Zhang X L, Xue L P 2008 Chin. Phys. B 17 3093
[15] Xia T, Zhang G Y, Xue L P, Zhang X L 2007 Acta Phys. Sin. 56 1741 (in Chinese) [夏天, 张国营, 薛刘萍, 张学龙 2007 56 1741]
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[1] de Oliveira N A, von Ranke P J 2010 Phys. Reports 489 89
[2] Hu F, Zhang G Y, Huang Y J, Xia W S 2014 Chin. Phys. Lett. 31 057501
[3] von Ranke P J, No'brega E P, de Oliveira I G, Gomes A M, Sarthour R S 2010 Phys. Rev. B 63 184406
[4] Mori H, Satoh T, Fujita T, Ohtsuka T 1982 J. Low. Temp. Phys. 49 397
[5] Zhang G Y, Xia T, Xue L P, Zhang X L 2006 Phys. Lett. A 360 327
[6] Zhang G Y, Wei M, Xia W S, Yang G 2009 J. Magn. Magn. Mater. 321 3077
[7] Hu F, Zhang G Y, Yang D, Zhang X L, Xue L P, Zhang L 2013 Chin. Phys. Lett. 30 087803
[8] Javorshy P, Schaudy G, Holubar T, Hilscher G 1994 Solid State Commun. 91 259
[9] Andreeff A, Frauenheim TH, Goremychkin E A, Griessmann H, Lippold B, Matz W, Chistyakov O D, Savitskii E M 1982 Phys. Status Solidi B 111 507
[10] Melero J J, Burriel R, Ibarra M R 1995 J. Magn. Magn. Mater. 140-144 841
[11] Ibarra M R, Arnaudas J I, Algarabel P A, del Moral A 1984 J. Magn. Magn. Mater. 46 167
[12] Mori H, Satoh T, Suzuki H, Ohtsuka T 1982 J. Phys. Soc. Jpn. 51 1785
[13] Yang G, Zhang G Y, Gao J, Xue L P, Xia T, Zhang X L 2011 Chin. Phys. B 20 017802
[14] Zhang G Y, Xia T, Zhang X L, Xue L P 2008 Chin. Phys. B 17 3093
[15] Xia T, Zhang G Y, Xue L P, Zhang X L 2007 Acta Phys. Sin. 56 1741 (in Chinese) [夏天, 张国营, 薛刘萍, 张学龙 2007 56 1741]
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