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.

引用

页数：5

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[21] Specific heat ratio, Gruneisen parameter and Debye temperature of crude oil [J].