STRUCTURAL AND MAGNETOELASTIC PROPERTIES OF Y3Fe27.2Cr1.8 AND Ce3Fe25Cr4 FERROMAGNETIC COMPOUNDS

Autor:	Ahmad Gholizadeh, Nasser Tajabor, Mohammad Behdani, F. Pourarian, Hadi Salamati, D. Sanavi Khoshnoud
Rok vydání:	2011
Předmět:	Magnetic anisotropy Materials science Ferromagnetism Condensed matter physics Intermetallic Statistical and Nonlinear Physics Magnetostriction Thermomagnetic convection Condensed Matter Physics Saturation (magnetic) Néel temperature Thermal expansion
Zdroj:	Modern Physics Letters B. 25:1949-1961
ISSN:	1793-6640 0217-9849
DOI:	10.1142/s0217984911027194
Popis:	The structural and magnetoelastic properties of polycrystalline samples of Y 3 Fe 27.2 Cr 1.8 and Ce 3 Fe 25 Cr 4 intermetallic compounds are investigated by means of X-ray diffraction, thermomagnetic, thermal expansion and magnetostriction measurements in the temperature range of 77–500 K under applied magnetic fields up to 1.5 T. The well defined anomalies observed in the linear thermal expansion coefficient curves are associated with the magnetic phase transitions and presence of small amounts of 1:12 phase in the Ce 3 Fe 25 Cr 4 sample; the latter is also confirmed by AC susceptibility measurements. For Y 3 Fe 27.2 Cr 1.8, saturation behavior is observed in the anisotropic magnetostriction isotherms near the magnetic ordering temperature (TC), whereas for Ce 3 Fe 25 Cr 4 compound, saturation starts well below TC. The additional anomalies observed in the volume magnetostriction isotherms of both compounds are explained based on the anisotropy field in the a–b plane and along the c-axis of the unit cell.
Databáze:	OpenAIRE
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