Journal ArticleDOI
Magnetic properties and spin polarization of Co 2 MnSi Heusler alloy thin films epitaxially grown on GaAs(001)
Wenting Wang,Wenting Wang,Marek Przybylski,Marek Przybylski,Wolfgang Kuch,Wolfgang Kuch,L. I. Chelaru,L. I. Chelaru,Jian Wang,Jian Wang,Y. F. Lu,J. Barthel,H. L. Meyerheim,J. Kirschner +13 more
Reads0
Chats0
TLDR
The spin polarization of photoelectrons close to the Fermi level was found to be at most 12%, in contrast to the predicted half-metallic behavior as mentioned in this paper. But the spin polarization was not consistent with the predicted spin-resolved density of states.Abstract:
Single-crystalline ${\mathrm{Co}}_{2}\mathrm{MnSi}$ Heusler alloy films have been grown on GaAs(001) substrates by pulsed laser deposition (PLD) The best crystallographic quality of the ${\mathrm{Co}}_{2}\mathrm{MnSi}$ films has been achieved after deposition at 450 K The films exhibit in-plane uniaxial magnetic anisotropy with the easy axis of magnetization along the [1-10] direction superimposed with a fourfold anisotropy with the easy axis along ⟨110⟩ Spin-resolved photoemission measurements of the single-crystalline ${\mathrm{Co}}_{2}\mathrm{MnSi}$ films reveal a spin-resolved density of states that is in qualitative agreement with recent band structure calculations The spin polarization of photoelectrons close to the Fermi level is found to be at most 12%, in contrast to the predicted half-metallic behavior We suggest that these discrepancies may be attributed to a partial chemical disorder in the ${\mathrm{Co}}_{2}\mathrm{MnSi}$ latticeread more
Citations
More filters
Journal ArticleDOI
Direct observation of half-metallicity in the Heusler compound Co2MnSi
Martin Jourdan,Jan Minár,Jürgen Braun,Alexander Kronenberg,Stanislav Chadov,Benjamin Balke,Andrei Gloskovskii,M. Kolbe,Hans-Joachim Elmers,Gerd Schönhense,Hubert Ebert,Claudia Felser,Mathias Kläui +12 more
TL;DR: This work investigates epitaxial thin films of the compound Co2MnSi in situ by ultraviolet-photoemission spectroscopy, taking advantage of a novel multi-channel spin filter and shows a highly spin polarized bulk-like surface resonance ingrained in a half metallic bulk band structure.
Journal ArticleDOI
Properties of the quaternary half-metal-type Heusler alloy Co2Mn1-xFexSi
Benjamin Balke,Gerhard H. Fecher,Hem C. Kandpal,Claudia Felser,Keisuke Kobayashi,Eiji Ikenaga,Jung Jin Kim,Shigenori Ueda +7 more
TL;DR: In this article, the bulk properties of the quaternary Heusler alloy Co2Mn1�xFexSi with the Fe concentration x = 0,1/2,1 were investigated by means of x-ray diffraction, high-temperature magnetometry, Mossbauer spectroscopy, and differential scanning calorimetry.
Journal ArticleDOI
Correlation in the transition metal based Heusler compounds Co2MnSi and Co2FeSi
TL;DR: In this article, the dependence of the electronic structure on the lattice parameter was studied theoretically, and it was shown that on-site correlation may play an important role in the description of Heusler compounds with localized moments.
Journal ArticleDOI
Magnetic anisotropy, exchange and damping in cobalt-based full-Heusler compounds: an experimental review
TL;DR: In this article, a survey of magnetic anisotropy, exchange and damping properties of Co2M'Z compounds is presented, which are directly related to spin-spin and spin-orbit interactions.
Journal ArticleDOI
Development of a vacuum ultraviolet laser-based angle-resolved photoemission system with a superhigh energy resolution better than 1 meV.
Guodong Liu,Guiling Wang,Yong Zhu,Hongbo Zhang,Guochun Zhang,Xiaoyang Wang,Yong Zhou,Wentao Zhang,Haiyun Liu,Lin Zhao,Jianqiao Meng,Xiaoli Dong,Chuangtian Chen,Zuyan Xu,Xingjiang Zhou +14 more
TL;DR: The new VUV laser-based ARPES system exhibits superior performance, including superhigh energy resolution better than 1 meV, high momentum resolution, superhigh photon flux, and much enhanced bulk sensitivity, which are demonstrated from measurements on a typical Bi2Sr2CaCu2O8 high temperature superconductor.
References
More filters
Journal ArticleDOI
Making Nonmagnetic Semiconductors Ferromagnetic
TL;DR: The magnetic coupling in all semiconductor ferromagnetic/nonmagnetic layered structures, together with the possibility of spin filtering in RTDs, shows the potential of the present material system for exploring new physics and for developing new functionality toward future electronics.
Journal ArticleDOI
New Class of Materials: Half-Metallic Ferromagnets
TL;DR: The band structure of Mn-based Heusler alloys of the crystal structure (MgAgAs type) has been calculated with the augmented-spherical-wave method.
Journal ArticleDOI
X-ray circular-dichroism as a probe of orbital magnetization
B. T. Thole,B. T. Thole,B. T. Thole,P. Carra,P. Carra,P. Carra,Francesco Sette,Francesco Sette,Francesco Sette,G. van der Laan,G. van der Laan,G. van der Laan +11 more
TL;DR: A new magneto-optical sum rule is derived for circular magnetic dichroism in the x-ray region (CMXD) and applications are discussed to transition-metal and rare-earth magnetic systems.
Journal ArticleDOI
X-ray circular-dichroism and local magnetic-fields
Paolo Carra,Paolo Carra,Paolo Carra,B. T. Thole,B. T. Thole,B. T. Thole,Massimo Altarelli,Massimo Altarelli,Massimo Altarelli,Xindong Wang,Xindong Wang,Xindong Wang +11 more
TL;DR: Sum rules are derived for the circular dichroic response of a core line (CMXD) that relate the intensity of the CMXD signal to the ground-state expectation value of the magnetic field operators (orbital, spin, and magnetic dipole) of the valence electrons.
Journal ArticleDOI
Fundamental obstacle for electrical spin injection from a ferromagnetic metal into a diffusive semiconductor
TL;DR: In this paper, the spin-polarization effects of a current in a two-dimensional electron gas which is contacted by two ferromagnetic metals were calculated, and it was shown that for a typical device geometry, the degree of spin polarization of the current is limited to less than 0.1% only.