Effect of Ga addition to NdFeCoB on their magnetic properties

Tsutai, A.; Sakai, I.; Mizoguchi, T.; Inomata, K.
September 1987
Applied Physics Letters;9/28/1987, Vol. 51 Issue 13, p1043
Academic Journal
It was found that the Ga addition to NdFeCoB magnets was very effective for improving their magnetic properties. Magnets with high boron concentration had a high coercive force and magnets with low boron concentration had a high-energy product. The following magnetic properties were obtained: (1) Nd14.5FebalCo16Ga1B9.5:Br=12.0 kG, IHc=15.3 kOe, (BH)max=34 MGOe, Tc=500 °C (2) Nd14.5FebalCo16Ga1B5.5:Br=13.1 kG, IHc=12.2 kOe, (BH)max=40 MGOe, Tc=500 °C. It was also found that NdFeCoGaB magnets with very low boron concentration still had a relatively high coercive force.


Related Articles

  • Effect of Ga addition to the Pr[sub 3](Fe,Co,Ti)[sub 29] (3:29) system. Sirisha, K.; Huang, M.-Q.; McHenry, M. E.; Chen, Q.; Ma, B. M. // Journal of Applied Physics;5/1/2000, Vol. 87 Issue 9, p5275 

    Polycrystalline Ga-substituted Pr[sub 3](Fe[sub 1-x]Co[sub x])[sub 27.5]Ti[sub 1.5] (x=0.3,0.4) magnets have been studied for high temperature permanent magnets. Using x-ray diffraction, in addition to the majority 3:29 phase, the presence of the minority 2:17, 1:12 and α-Fe phases was...

  • Quantifying electrical spin injection: Component-resolved electroluminescence from spin-polarized light-emitting diodes. Jonker, B. T.; Hanbicki, A. T.; Park, Y. D.; Itskos, G.; Furis, M.; Kioseoglou, G.; Petrou, A.; Wei, X. // Applied Physics Letters;11/5/2001, Vol. 79 Issue 19, p3098 

    The spin-polarized light-emitting diode (spin-LED) is a very effective tool for accurately quantifying electrical spin injection in a model independent manner. We resolve and identify various components which occur in the electroluminescence (EL) spectra of GaAs quantum-well-based spin-LEDs, and...

  • Negative magnetoresistance in GaAs with magnetic MnAs nanoclusters. Akinaga, H.; De Boeck, J.; Borghs, G.; Miyanishi, S.; Asamitsu, A.; Van Roy, W.; Tomioka, Y.; Kuo, L. H. // Applied Physics Letters;6/22/1998, Vol. 72 Issue 25 

    We show a negative magnetoresistance (MR) in GaAs with magnetic MnAs nanoclusters (about 1.5% at 30 K in 1 T). The clusters were formed in a two step process consisting of the molecular beam epitaxy of (Ga,Mn)As layer and the subsequent annealing. The origin of the negative MR is attributed to...

  • Spin-dependent tunneling and properties of ferromagnetic (Ga,Mn)As (invited). Ohno, H.; Matsukura, F. // Journal of Applied Physics;4/15/1999 Part 2A of 2, Vol. 85 Issue 8, p4277 

    Provides information on a study which reviewed the growth, magnetotransport and magnetic properties of gallium-magnesium-arsenic ((Ga,Mn)As) alloys. Preparation of (Ga,Mn)As; Magnetic properties; Spin-dependent tunneling in resonant tunneling structures.

  • ...Fe Mossbauer spectroscopic investigation of complex magnetic structures in Ga, Sc, and In... Clark, T. M.; Evans, B. J. // Journal of Applied Physics;4/15/1999 Part 2A of 2, Vol. 85 Issue 8, p5229 

    Presents information on a study which investigated the magnetic structures of gallium, scandium and indium substituted M-type hexagonal ferrites. Experimental details; Results and discussion.

  • Magnetoelasticity of Cr-Ga alloy single crystals at high pressures. Prinsloo, A.R.E.; Alberts, H.L. // Journal of Applied Physics;4/15/1999 Part 2A of 2, Vol. 85 Issue 8, p4747 

    Examines the magnetoelasticity of chromium-gallium alloy single crystals at high pressures. Experimental methods; Hydrostatic pressure derivatives of the second-order elastic constants; Results; Conclusions.

  • Effects of Ga substitution for Fe on the structure and magnetic properties of Nd[sub 8.4]Fe[sub 87.1-x]Ga[sub x]B[sub 4.5] (x=0–2.2) alloys prepared by mechanical alloying. Cui, B. Z.; Sun, X. K.; Liu, W.; Zhang, Z. D.; Geng, D. Y.; Zhao, X. G.; Liu, J. P.; Sellmyer, D. J. // Journal of Applied Physics;5/1/2000, Vol. 87 Issue 9, p5335 

    The effects of a partial substitution of Ga for Fe on the structure and magnetic properties of mechanically alloyed Nd[sub 8.4]Fe[sub 87.1]B[sub 4.5] were studied. With increasing Ga content, the magnetic properties of the nanocomposite magnets first improve, reach maxima at 1.1 at. % Ga, and...

  • Magnetic and structural properties of nonstoichiometric Ni[sub 2]MnGa alloys with Ni and Ga excess. Golub, Vladimir O.; Vovk, Andriy Ya.; O’Connor, Charles J.; Kotov, Vitaliy V.; Yakovenko, Peter G.; Ullakko, Kari // Journal of Applied Physics;5/15/2003, Vol. 93 Issue 10, p8504 

    The influence of nickel and gallium excess on local structure and magnetic properties of Ni-Mn-Ga alloys has been studied. Nuclear magnetic resonance experiments showed that excessive Ni occupies Mn and Ga positions. This leads to the appearance of low-frequency line from the nearest Mn[SUP55]...

  • Effect of site-disorder on magnetism and magneto-structural coupling in gallium ferrite: A first-principles study. Roy, Amritendu; Prasad, Rajendra; Auluck, Sushil; Garg, Ashish // Journal of Applied Physics;Feb2012, Vol. 111 Issue 4, p043915 

    We report a first-principles study of the magnetic properties, cation site disorder effect on magnetism and magneto-structural coupling in multiferroic gallium ferrite (GFO) using the local spin density approximation (LSDA+U) of the density functional theory. The calculation of the ground state...


Read the Article


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

Try another library?
Sign out of this library

Other Topics