Magnetic characterization of the (Zr,Sm)Co3 phase in Sm(CoFeCuZr)z magnets
作者： M. F. de Campos , R. K. Murakami , S. A. Romero , H. R. Rechenberg , F. P. Missell
DOI: 10.1063/1.2709759
关键词:
摘要: Magnets with composition Sm(CobalFe0.2Cu0.1Zrx)8 (x=0;0.02;0.04;0.06,0.08) were studied using x-ray diffraction Rietveld analysis. In addition to the majority 2:17 and 1:5 phases, magnets present a rhombohedral (SmZr)1(CoFeCu)3 (PuNi3 structure) phase, whose volume fraction increases Zr addition. Higher contents decrease coercivity lead appearance of impurity phases such as 6:23 (Th6Mn23 structure), 2:7R (Gd2Co7 5:19R (Ce5Co19 in magnets. The 1:3R phase was reproduced Fe57-doped sample Sm0.33Zr0.67Co3 its Mossbauer spectra, at several temperatures, adjusted four sextets nonmagnetic doublet. beneficial effect small additions on is discussed.
harvard.edu
scitation.org
aip.org
sci-hub.se 参考文章(23)
T. Ojima, S. Tomizawa, T. Yoneyama, T. Hori, Magnetic properties of a new type of rare-earth cobalt magnets Sm 2 (Co, Cu, Fe, M) 17 IEEE Transactions on Magnetics. ,vol. 13, pp. 1317- 1319 ,(1977) , 10.1109/TMAG.1977.1059703
T. Matthias, G. Zehetner, J. Fidler, W. Scholz, T. Schrefl, D. Schobinger, G. Martinek, TEM-analysis of Sm(Co,Fe,Cu,Zr)z magnets for high-temperature applications Journal of Magnetism and Magnetic Materials. ,vol. 242, pp. 1353- 1355 ,(2002) , 10.1016/S0304-8853(01)01280-X
M. V. Satyanarayana, H. Fujii, W. E. Wallace, Magnetic properties of substituted Sm2Co17−xTxcompounds (T = V, Ti, Zr, and Hf) Journal of Applied Physics. ,vol. 53, pp. 2374- 2376 ,(1982) , 10.1063/1.330862
C. Heide, A. G. Temiryazev, M. P. Tikhomirova, P. E. Zilberman, Nonlinear spin wave resonance modes Journal of Applied Physics. ,vol. 87, pp. 4972- 4974 ,(2000) , 10.1063/1.373219
S. Derkaoui, N. Valignat, C.H. Allibert, Co corner of the system SmCoZr: decomposition of the phase 1:7 and equilibria at 850°C Journal of Alloys and Compounds. ,vol. 235, pp. 112- 119 ,(1996) , 10.1016/0925-8388(95)02119-1
M.F. de Campos, A.C. Neiva, S.A. Romero, H.R. Rechenberg, F.P. Missell, Impurity phases in Sm(CoFeCuZr)z magnets: The role of Zr Journal of Alloys and Compounds. ,vol. 403, pp. 329- 334 ,(2005) , 10.1016/J.JALLCOM.2005.05.007
H. Oesterreicher, On the coercivity of cellular Sm2Co17-SmCo5 permanent magnets Journal of the Less Common Metals. ,vol. 99, pp. L17- L20 ,(1984) , 10.1016/0022-5088(84)90234-0
J. Fidler, P. Skalicky, F. Rothwarf, High resolution electron microscope study of Sm(Co, Fe, Cu, Zr) 7.5 magnets IEEE Transactions on Magnetics. ,vol. 19, pp. 2041- 2043 ,(1983) , 10.1109/TMAG.1983.1062752
L. Rabenberg, R. Mishra, G. Thomas, Comments on "High resolution electron microscope study of Sm(Co, Fe, Cu, Zr) 7.5 magnets" IEEE Transactions on Magnetics. ,vol. 19, pp. 2723- 2725 ,(1983) , 10.1109/TMAG.1983.1062800
M.F. de Campos, A.C. Neiva, S.A. Romero, R.K. Murakami, H.R. Rechenberg, F.P. Missell, The (SmZr)Co $_3$ Phase in Sm(CoFeCuZr) $_rm z$ Magnets IEEE Transactions on Magnetics. ,vol. 42, pp. 3770- 3772 ,(2006) , 10.1109/TMAG.2006.884058