High-pressure studies with nuclear scattering of synchrotron radiation

被引：30
|
作者：
Lübbers, R [1 ]
Wortmann, G
Grünsteudel, HF
机构：
[1] Univ Gesamthsch Paderborn, FB Phys, D-33095 Paderborn, Germany
[2] European Synchrotron Radiat Facil, F-38043 Grenoble, France
来源：
HYPERFINE INTERACTIONS | 1999年 / 123卷 / 1-8期
关键词：
high pressure; magnetism; valence transition; phase transition;
D O I：
10.1023/A:1017032125551
中图分类号：
O64 [物理化学（理论化学）、化学物理学]; O56 [分子物理学、原子物理学];
学科分类号：
070203 ; 070304 ; 081704 ; 1406 ;
摘要：
The nuclear forward scattering (NFS) of synchrotron radiation is especially suited for probing magnetism at high pressure (h.p.), here in the Mbar range, by the nuclear resonances of Fe-57 and Eu-151. We report on high-pressure NFS studies with the 14.4 keV transition of Fe-57, presenting at first the pressure induced alpha-epsilon transformation in iron. Then a systematic study of magnetic RFe2 Laves phases of cubic C15 structure (YFe2, GdFe2) and hexagonal C14 structure (ScFe2, TiFe2) at pressures up to 100 GPa (= 1 Mbar) is given. First, high-pressure NFS studies performed with the 21.5 keV resonance of Eu-151 are also presented, probing valence transitions in EuNi2Ge2 and the magnetism in the CsCl-type h.p. phase of EuTe. Finally, we discuss future applications, such as high-pressure studies of phonon densities of states, using the inelastic channel of nuclear scattering of synchrotron radiation.
引用
收藏
页码：529 / 559
页数：31
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