Electronic structure of La(Fe0.88Si0.12)13

Nozomu Kamakura, Tetsuo Okane, Yukiharu Takeda, Shin Ichi Fujimori, Yuji Saitoh, Hiroshi Yamagami, Atsushi Fujimori, Asaya Fujita, Shun Fujieda, Kazuaki Fukamichi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

4 Citations (Scopus)

Abstract

La(Fe0.88Si0.12)13 shows peculiar magnetic properties such as the first order paramagnetic-ferromagnetic transition and magnetic-field induced metamagnetic transition accompanied by the lattice expansion. The practical application using the magnetic transition temperature controlled by hydrogen absorption is expected in this compound. Here, the electronic structure of La(Fe0.88Si0.12)13 has been investigated by photoemission spectroscopy using synchrotron soft x-rays. The Fe 3s core-level photoemission spectra below and above the Curie temperature TC exhibit a satellite structure at ∼ 4.3 eV higher binding energy than the main peak, which is attributed to the exchange splitting due to the local moment of Fe. The exchange splitting of the Fe 3s photoemission spectrum with the asymmetric line shape shows that the magnetization of La(Fe0.88Si0.12)13 is derived by the exchange split Fe 3d bands like the itinerant ferromagnetism in Fe metal, while the magnetic transition of La(Fe0.88Si0.12)13 is the first order. The valence band photoemission spectrum shows temperature dependence across the TC. The temperature dependence of the photoemission spectra is discussed based on the difference between the electronic structure in the ferromagnetic phase and that in the paramagnetic phase.

Original languageEnglish
Title of host publicationIn-Situ and Operando Probing of Energy Materials at Multiscale Down to Single Atomic Column - The Power of X-Rays, Neutrons and Electron Microscopy
PublisherMaterials Research Society
Pages109-114
Number of pages6
ISBN (Print)9781605112398
DOIs
Publication statusPublished - 2010 Jan 1

Publication series

NameMaterials Research Society Symposium Proceedings
Volume1262
ISSN (Print)0272-9172

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Fingerprint Dive into the research topics of 'Electronic structure of La(Fe<sub>0.88</sub>Si<sub>0.12</sub>)<sub>13</sub>'. Together they form a unique fingerprint.

Cite this