Spontaneous and induced, by field or pressure, magnetic phase transitions in the Ce2Fe17-xMnx system / Kuchin A.G., Khrabrov V.I., Arnol'd Z., Prokhnenko O., Pirogov A.N., Teplykh A.E., Medvedeva I.V., Belozerov E.V., Makarova G.M., Kamarád J., Ermolenko A.S. // Physics of Metals and Metallography. - 2002. - V. 93, l. SUPPL. 1. - P. S40-S44.

ISSN:
0031918X
Type:
Conference Paper
Abstract:
The compounds Ce2Fe17-xMnx (x = 0-3) were synthesized and their structure and magnetic properties were studied. The compounds crystallize in the rhombohedral Th2Zn17-type structure. Neutron diffraction study of the compounds Ce2Fe17-xMnx shows that Mn favors the 6c site and completely avoids the 9d site, whereas the 18f and 18h sites are occupied almost randomly. A binary compound Ce2Fe17 shows ferromagnetic behavior below ΘT = 94 K and antiferromagnetic order up to TN = 206 K. The Néel temperature of the compounds Ce2Fe17-xMnx decreases almost monotonously with increasing Mn content, whereas ΘT(x) values vanish in the interval x = 0.5-1.0. For the latter compounds, a metamagnetic transition from an antiferromagnetic to an induced ferromagnetic state occurs at ∼(4-7) kOe. The application of pressure leads to a suppression of the ferromagnetic state (dΘT/dP = -38 K/kbar and -30 K/kbar for x = 0 and 0.35, respectively). The effect of pressure on Néel temperature is moderate (dTN/dP = -1.7 K/kbar and -2.2 K/kbar for x = 0 and 0.35, respectively). An increase in the ac susceptibility was observed at pressures higher than 1 kbar below 80 K for Ce2Fe16Mn1. The results show the significant role of the competition between positive and negative Fe-Fe, Mn-Mn, and Fe-Mn exchange interactions and pronounced nonstatistical distributions of Mn and Fe ions over crystal sites.
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Affiliations Institute of Metal Physics, ul. S. Kovalevskoi 18, Ekaterinburg 620219, Russian Federation
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Correspondence Address Kuchin, A.G.; Institute of Metal Physics, ul. S. Kovalevskoi 18, Ekaterinburg 620219, Russian Federation
Language of Original Document English
Abbreviated Source Title Phys. Met. Metallogr.
Source Scopus