TITLE

Noncollinear magnetism and enhancement of magnetocrystalline anisotropy at the Σ3(111) grain boundary in ferromagnetic Fe

AUTHOR(S)
Nakamura, Kohji; Ito, Tomonori; Freeman, A. J.; Zhong, Lieping; Fernandez-de-Castro, Juan
PUB. DATE
June 2004
SOURCE
Applied Physics Letters;6/14/2004, Vol. 84 Issue 24, p4974
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Magnetic structures and magnetocrystalline anisotropy of the Σ3[110](111) grain boundary (GB) in ferromagnetic Fe are investigated by the first-principles full-potential linearized augmented plane-wave method including intra-atomic noncollinear magnetism. In breaking the spatial translation symmetry in a crystalline solid, the GB is found to give rise to a magnetic noncollinearity, where the magnetic moments at both sides of the GB orient at an angle of about 10° with respect to each other. Importantly, the presence of the GB enhances the magnetocrystalline anisotropy energy by one order of magnitude from its bulk value and may induce a pinning effect on the magnetization rotation or magnetic domain wall motion. © 2004 American Institute of Physics.
ACCESSION #
13269837

 

Related Articles

  • Thermal stability and magnetic anisotropy of nickel nanoplates. Yonghua Leng; Jie Zheng; Jianglan Qu; Xingguo Li // Journal of Materials Science;Sep2009, Vol. 44 Issue 17, p4599 

    The thermal stability and magnetic anisotropies of nickel nanoplates with {111} planes as the exposure plane are studied. The melting point of Ni nanoplates drastically drops as compared to that of the bulk one due to the significant increase in the surface free energy. For the large aspect...

  • Perpendicular magnetization reversal, magnetic anisotropy, multistep spin switching, and domain nucleation and expansion in Ga1-xMnxAs films. Liu, X.; Lim, W. L.; Titova, L. V.; Dobrowolska, M.; Furdyna, J. K.; Kutrowski, M.; Wojtowicz, T. // Journal of Applied Physics;9/15/2005, Vol. 98 Issue 6, p063904 

    We present a comprehensive study of the reversal process of perpendicular magnetization in thin layers of the ferromagnetic semiconductor Ga1-xMnxAs. For this investigation we have purposely chosen Ga1-xMnxAs with a low Mn concentration (x≈0.02), since in such specimens contributions of...

  • Magnetic phase diagram of a ferromagnet-antiferromagnet-ferromagnet spin-valve structure with rough interfaces. Morosov, A. I.; Morosov, I. A. // Physics of the Solid State;Oct2008, Vol. 50 Issue 10, p1924 

    The thickness-roughness phase diagram of a ferromagnet-antiferromagnet-ferromagnet spinvalve system is studied in the case where the roughness of the interfaces between the layers causes frustration of the exchange interaction between them. It is shown that the inclusion of easy-axis single-ion...

  • Modification of the ferromagnetic anisotropy and exchange bias field of NiFe/CoO/Co trilayers through the CoO spacer thicknesses. Lin, K.-W.; Lan, T.-C.; Shueh, C.; Skoropata, E.; van Lierop, J. // Journal of Applied Physics;2014, Vol. 115 Issue 17, p17D717-1 

    We have investigated the magnetism of NiFe/CoO/Co trilayers with different CoO spacer thicknesses. The dependence of the coercivity (Hc) and exchange bias field (Hex) on the CoO thicknesses indicated that different pinning strengths from the CoO were acting on the top NiFe and bottom Co layers,...

  • Temperature control of local magnetic anisotropy in multiferroic CoFe/BaTiO3. Lahtinen, Tuomas H. E.; van Dijken, Sebastiaan // Applied Physics Letters;3/18/2013, Vol. 102 Issue 11, p112406 

    This paper reports on the temperature evolution of local elastic interactions between ferromagnetic CoFe films and ferroelectric BaTiO3 substrates. Polarization microscopy measurements indicate that growth-induced stripe domains in the CoFe films are preserved and strengthened during cooling and...

  • First-principle description of magnonic PdnFem multilayers. Manchanda, P.; Sahota, P. K.; Skomski, R.; Anil Kumar, P. S.; Kashyap, A. // Journal of Applied Physics;Apr2011, Vol. 109 Issue 7, p07C110 

    Ab-initio calculations are used to determine the parameters that determine magnonic band structure of PdnFem multilayers (n = 2, m ≤ 8). We obtain the layer-resolved magnetization, the exchange coupling, and the magnetic anisotropy of the Pd-Fe structures. The Fe moment is 3.0 μB close...

  • Influence of induced anisotropy on the processes of magnetization reversal of cobalt circular nanodots. Ivanov, Yu. P.; Il'in, A. I.; Pustovalov, E. V.; Chebotkevich, L. A. // Physics of the Solid State;Aug2010, Vol. 52 Issue 8, p1694 

    The magnetic structure and the processes of magnetization reversal of individual cobalt nanodots and arrays of cobalt nanodots have been studied using the magneto-optical Kerr effect and magnetic force microscopy. Arrays of nanodots have been prepared by ion etching from a continuous cobalt...

  • The interface effect of the magnetic anisotropy in ultrathin epitaxial Fe3O4 film. Huang, Z. C.; Zhai, Y.; Lu, Y. X.; Li, G. D.; Wong, P. K. J.; Xu, Y. B.; Xu, Y. X.; Zhai, H. R. // Applied Physics Letters;3/17/2008, Vol. 92 Issue 11, p113105 

    The magnetic anisotropy of epitaxial layered structures of Fe3O4(tFe=4 nm)/GaAs(100), MgO(3 nm)/Fe3O4(tFe=4 nm)/GaAs(100), and Fe3O4(tFe=4 nm)/MgO(3 nm)/Fe3O4(tFe=4 nm)/GaAs(100) was studied by ferromagnetic resonance. It was shown that a predominant in-plane uniaxial magnetic anisotropy and a...

  • Micromagnetic simulations of spin-wave normal modes and the spin-transfer-torque driven magnetization dynamics of a ferromagnetic cross. Pramanik, Tanmoy; Roy, Urmimala; Tsoi, Maxim; Register, Leonard F.; Banerjee, Sanjay K. // Journal of Applied Physics;2014, Vol. 115 Issue 17, p17D123-1 

    We studied spin-transfer-torque (STT) switching of a cross-shaped magnetic tunnel junction in a recent report [Roy et al., J. Appl. Phys. 113, 223904 (2013)]. In that structure, the free layer is designed to have four stable energy states using the shape anisotropy of a cross. STT switching...

Share

Read the Article

Courtesy of VIRGINIA BEACH PUBLIC LIBRARY AND SYSTEM

Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics