Magnetic structure and magneto-volume anomalies in Er2Fe17 compound

被引:6
作者
Alvarez, Pablo [1 ]
Gorria, Pedro [1 ]
Sanchez Marcos, Jorge
Puente Orench, Ines
Rodriguez Velamazan, Jose Alberto
Cuello, Gabriel
Sanchez Llamazares, Jose L.
Blanco, Jesus A. [1 ]
机构
[1] Univ Oviedo, Dept Fis, E-33007 Oviedo, Spain
来源
5TH MEETING OF THE SPANISH NEUTRON SCATTERING ASSOCIATION | 2011年 / 325卷
关键词
NEUTRON POWDER DIFFRACTION; SPONTANEOUS MAGNETOSTRICTION; INTERMETALLIC COMPOUNDS; THERMAL-EXPANSION; RARE-EARTH; TRANSITION; TEMPERATURE;
D O I
10.1088/1742-6596/325/1/012011
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Neutron powder diffraction shows that the intermetallic Er(2)Fe(17) compound with hexagonal crystal structure has a ferrimagnetic ground state (T(C) = 303 K). At T = 5 K the magnetic moments of Fe sublattice (mu similar to 2 mu(B)) are therefore antiparalell to those of the Er one (mu similar to 9 mu(B)), all of them lying on the basal plane. This compound exhibits strong magneto-volume effects up to temperatures in the vicinity of T(C). Neutron thermo-diffraction experiments also show an anomalous temperature dependence of the cell volume, including a negative thermal expansion coefficient below 300 K. In addition, a positive spontaneous volume magnetostriction is observed up to T similar to 400 K, with a maximum (omega(S) similar to 0.02) located at T = 5 K.
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页数:5
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