XAS and XMCD spectroscopies to study matter at high pressure: Probing the correlation between structure and magnetism in the 3d metals

• Published in: Coordination chemistry reviews 2014-10, Vol.277-278, p.80-94
• Main Authors: Torchio, R., Mathon, O., Pascarelli, S.
• Format: Article
• Language: English
• Subjects: 3d metals; High pressure; K-edge XMCD; X-ray absorption
• ISSN: 0010-8545; 1873-3840
• DOI: 10.1016/j.ccr.2014.02.024

•X-ray absorption spectroscopy coupled to the diamond anvil cell technology is a powerful tool to investigate matter at high pressure.•Several X-ray absorption spectroscopy beamlines at synchrotrons around the world are equipped to offer XAS and XMCD spectroscopy for high pressure studies.•X-ray magnetic circular dichroism has been employed to investigate pressure induced suppression of ferromagnetism in Fe, Co and Ni.•The availability of high quality data at extreme conditions is very useful to validate existing theoretical models. The study of the properties of matter under extreme conditions allows reproducing the physical conditions of inaccessible regions of the earth and planets, encountering a geophysical interest. Also it addresses fundamental questions concerning the stability of the crystallographic structure, the magnetic order and the electronic structure thus giving an insight into their own appearance. In this review we illustrate how X-ray absorption spectroscopies, coupled to diamond anvil cell techniques, can be successfully employed at this purpose. As an example, we describe recent advances in the investigation of the ferromagnetic transition metals under high pressure.