Magnetism of close packed Fe 147 clusters

نویسندگان

  • M. E. Gruner
  • G. Rollmann
  • S. Sahoo
  • P. Entel
چکیده

We present ab initio density functional theory calculations of the magnetic structure of perfectly cuboctahedral nanoparticles consisting of 147 iron atoms. The results are compared to geometrically relaxed cuboctahedral and icosahedral Fe147-clusters. It is found, that structural relaxation leads to a compression, which reduces especially the moments of the central atoms of the cluster, while surface magnetism remains practically unaffected.

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

COMPUTATIONAL ENUMERATION OF POINT DEFECT CLUSTERS IN DOUBLE- LATTICE CRYSTALS

The cluster representation matrices have already been successfully used to enumerate close-packed vacancy clusters in all single-lattice crystals [I, 2]. Point defect clusters in double-lattice crystals may have identical geometry but are distinct due to unique atomic postions enclosing them. The method of representation matrices is extended to make it applicable to represent and enumerate ...

متن کامل

Role of Co in enhancing the magnetism of small Fe clusters

Using ab initio calculations, we study the magnetic features of the FemCon, m+n 6 clusters and investigate the role of Co in enhancing the magnetism of the Fe grains. Our results show that the role of Co appears to be that of inducing structural changes in the grain which may lead to enhanced magnetic moments for the Co-Fe clusters as a result of the rehybridization process and the following re...

متن کامل

Magnetism of Fe clusters and islands on Pt surfaces

Clusters and islands of Fe atoms have been prepared by noble gas buffer layer assisted growth as well as by standard molecular beam epitaxy on Pt substrates. Xe buffer layers have been utilized to promote the formation of compact, relaxed Fe clusters with narrow size distribution. Without the Xe buffer, strained Fe islands with a characteristic misfit dislocation network are formed. Magnetizati...

متن کامل

Noncollinear magnetism of Cr clusters on Fe surfaces

The magnetic properties of small Cr clusters on Fe surfaces have been investigated using a self-consistent noncollinear spd tight-binding method, parametrized through ab initio tight-binding linear muffin-tin orbital results. A competition between antiferromagnetic coupling within the cluster and antiferromagnetic coupling with the Fe surface has been found, leading to noncollinear magnetic arr...

متن کامل

Noncollinear magnetism caused by intermixing at ferromagnetic/antiferromagnetic interfaces

Fe-Cr alloy layers on Fe 001 substrates with different atomic environments are theoretically investigated through a self-consistent real-space tight-binding method parametrized to density functional theory and without collinear restriction for the spin directions. We show that the intermixing at the Cr/Fe interface, experimentally observed at the first stages of the Cr growth on Fe, originates ...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

ثبت نام

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

عنوان ژورنال:

دوره   شماره 

صفحات  -

تاریخ انتشار 2006