"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Electronic structure and magnetic properties of Ni1-xMnxAl alloys

V. REDNIC1,2,* , O. ISNARD3, M. NEUMANN4, L. REDNIC1,2, M. COLDEA1, N. ALDEA2

Affiliation

  1. Babes-Bolyai University, Faculty of Physics, Kogalniceanu 1, 400084 Cluj-Napoca, Romania
  2. National Institute for Research and Development of Isotopic and Molecular Technologies, P. O. Box 700, 400293 Cluj- Napoca, Romania
  3. Université J. Fourier, Institut Néel du CNRS, 25 rue des martyrs, 38042 Grenoble Cedex 9, France
  4. University of Osnabrück, Fachbereich Physik, 49069 Osnabrück, Germany

Abstract

XPS, magnetization and magnetic susceptibility measurements of Ni1-xMnxAl (x=0.0, 0.2, 0.3, 0.4, 0.5, 0.6, 0.8) alloys are reported. X-ray diffraction measurements showed that all investigated alloys are single phases with the same CsCl structure type. The hybridization between Al 3sp and Ni 3d states and Al 3sp and Mn 3d states leads to a partial filling of the Ni and Mn 3d bands. Like in the parent compound NiAl, the Anderson condition for the existence of a local magnetic moment on Ni site in Ni1-xMnxAl is not fulfilled. The contribution of Ni atoms to the measured magnetic susceptibility may be explained in the frame of the self-consistent renormalization theory of spin fluctuations. The ferromagnetic behaviour of the Ni1-xMnxAl alloys (x>0) is due to the interaction of local magnetic moments confined on Mn sites. The correlation between the magnetic results in the ordered and paramagnetic state indicates the presence of a number of antiferromagnetically coupled Mn-Mn pairs..

Keywords

Transition metal, Alloy, Magnetic measurements, XPS spectra, Local moments.

Submitted at: July 7, 2011
Accepted at: Nov. 23, 2011

Citation

V. REDNIC, O. ISNARD, M. NEUMANN, L. REDNIC, M. COLDEA, N. ALDEA, Electronic structure and magnetic properties of Ni1-xMnxAl alloys, Journal of Optoelectronics and Advanced Materials Vol. 13, Iss. 11-12, pp. 1519-1523 (2011)