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Magnetic properties and electronic structures of YCo3-xNixB2 compounds

E. BURZO1,* , P. VLAIC1, V. POP1, I. CREANGA1

Affiliation

  1. Faculty of Physics, Babes-Bolyai University, 400084 Cluj-Napoca, Romania

Abstract

The YCo3-xNixB2 compounds for x≤2 are paramagnetic in al the temperature range. The magnetic susceptibilities increase up to a temperature Tm and above a characteristic value T* a Curie-Weiss behavior was shown. The Tm values decrease from ≅ 150 K (x=0) to ≅ 25 K (x=2). The effective cobalt magnetic moment in YCo3B2 compound is 1.34 µB. The band structure calculations show that the Fermi level in YCo3B2 is situated near a maximum in the density of states. When increasing Ni content the Fermi level shift gradually to a region with lower DOS. The magnetic behavior of the above system is analyzed in the spin fluctuation model..

Keywords

Rare earth compounds, Magnetic measurements, Band structure, Spin fluctuation.

Submitted at: Jan. 18, 2006
Accepted at: March 23, 2006

Citation

E. BURZO, P. VLAIC, V. POP, I. CREANGA, Magnetic properties and electronic structures of YCo3-xNixB2 compounds, Journal of Optoelectronics and Advanced Materials Vol. 8, Iss. 2, pp. 484-486 (2006)