članak: 1 od 1  
Hemijska industrija
2007, vol. 61, br. 3, str. 147-151
jezik rada: srpski
naučni članak
doi:10.2298/HEMIND0703147M

Zn-Mn-O - feromagnetik na sobnoj temperaturi
Institut za nuklearne nauke Vinča

e-adresa: dusanm@vin.bg.ac.yu

Sažetak

Ispitivani su poluprovodnički Zn-Mn-O kristali dobijeni metodom sinteze u čvrstom stanju - termičkom dekompozicijom odgovarajućih oksalata i termičkim tretmanom. Termički tretman je izvršen u vazduhu na različitim temperaturama u intervalu od 400 do 900 °C. Nominalne koncentracije mangana su x = 0,01; 0,02; 0,04 i 0,10. Uzorci su ispitivani metodom difrakcije X-zraka na prahu, merenjem magnetizacije i metodom elektronske paramagnetne rezonance. Analiza difraktograma ukazuje na dominantnu vurcitnu kristalnu strukturu sintetisanog Zn-Mn-O materijala. Feromagnetizam na sobnoj temperaturi je uočen na uzorcima Zn-Mn-O sa koncentracijom mangana x ≤ 0,04 termički tretiranim na nižim temperaturama (500 °C). Magnetizacija zasićenja u uzorku x = 0,01 iznosi 0,05 μB/Mn. Ferromagnetna faza je verovatno posledica difuzije Zn u neki manganov oksid.

Ključne reči

magnetni poluprovodnici; feromagnetizam na sobnoj temperaturi; Zn-Mn-O

Reference

Chen, W., Zhao, L.F., Wang, Y.Q., Miao, J.H., Liu, S., Xia, Z.C., Yuan, S.L. (2005) Magnetism in Mn-doped ZnO bulk samples. Solid State Communications, 134(12), 827-830
Chen, W., Zhao, L.F., Wang, Y.Q., Mao, J.H., Liu, S., Xia, Z.C., Yuan, S.L. (2005) Effects of temperature and atmosphere on the magnetism properties of Mn-doped ZnO. Applied Physics Letters, 87(4): 042507
Coey, J.M.D., Sanvito, S. (2004) Magnetic semiconductors and half-metals. Journal of Physics D: Applied Physics, 37(7), 988-993
Costa-Kramer, J.L., Briones, F., Fernandez, J.F., Caballero, A.C., Villegas, M., Diaz, M., Garda, M.A., Hernando, A. (2005) Nanostructure and magnetic properties of the MnZnO system, a room temperature magnetic semiconductor?. Nanotechnology, 16(2): 214
Dietl, T., Ohno, H., Matsukura, F., Cibert, J., Ferrand, D. (2000) Zener model description of ferromagnetism in zinc-blende magnetic semiconductors. Science, 287(5455), 1019-1022
Dietl, T. (2002) Ferromagnetic semiconductors. Semiconductor Science and Technology, 17(4), 377-392
Garcia, M.A., Ruiz-Gonzalez, M.L., Quesada, A., Costa-Kramer, J.L., Fernandez, J.F., Khatib, S.J., Wennberg, A., Caballero, A.C., Martin-Gonzalez, M.S., Villegas, M., Briones, F., Gonzalez-Calbet, J.M., Hernando, A. (2005) Interface double-exchange ferromagnetism in the Mn-Zn-O system: New class of biphase magnetism. Physical review letters, Vol. 94, No. 21, pp. 217206
Jayakumar, O.D., Salunke, H.G., Kadam, R.M., Mohapatra, M., Yaswant, G., Kulshreshtha, S.K. (2006) Magnetism in Mn-doped ZnO nanoparticles prepared by co-precipitation method. Nanotechnology, 17(5), 1278-1285
Kakazey, M., Vlasova, M., Dominguez-Patino, M., Kliava, J., Tomila, T. (2006) Solid-state reactivity of the ZnO-xMn2O3 system during heat treatment. Journal of the American Ceramic Society, 89(4), 1458-1460
Kittilstved, K.R., Norberg, N.S., Gamelin, D.R. (2005) Chemical manipulation of high-T(C) ferromagnetism in ZnO diluted magnetic semiconductors. Phys Rev Lett, 94(14): 147209
Kolesnik, S., Dabrowski, B., Mais, J. (2004) Structural and magnetic properties of transition metal substituted ZnO. Journal of Applied Physics, 95(5), 2582-2586
Kundaliya, D.C., Ogale, S.B., Lofland, S.E., Dhar, S., Metting, C.J., Shinde, S.R., Ma, Z., Varughese, B., Ramanujachary, K.V., Salamanca-Riba, L., Venkatesan, T. (2004) On the origin of high-temperature ferromagnetism in the low-temperature-processed Mn-Zn-O system. Nat Mater, 3(10): 709-14
Lawes, G., Risbud, A.S., Ramirez, A.P., Seshadri, R. (2005) Absence of ferromagnetism in Co and Mn substituted polycrystalline ZnO. Physical Review B, 71(4): 045201
Manivannan, A., Dutta, P., Glaspell, G., Seehra, M.S. (2006) Nature of magnetism in Co- and Mn-doped ZnO prepared by sol-gel technique. Journal of Applied Physics, 99(8): 08M110
Pearton, S.J., Heo, W.H., Ivill, M., Norton, D.P., Steiner, T. (2004) Dilute magnetic semiconducting oxides. Semiconductor Science and Technology, 19(10), R59-R74
Sharma, P., Gupta, A., Rao, K.V., Owens, F.J., Sharma, R., Ahuja, R., Guillen, O.J.M., Johansson, B., Gehring, G.A. (2003) Ferromagnetism above room temperature in bulk and transparent thin films of Mn-doped ZnO. Nat Mater, 2(10): 673-7
Zhang, H., Shi, E., Chen, Z., Liu, X., Xiao, B. (2006) Magnetism in Zn1-xMnxO crystal prepared by hydrothermal method. Solid State Communications, 137(5), 272-274
Zhang, J., Skomski, R., Sellmyer, D.J. (2005) Sample preparation and annealing effects on the ferromagnetism in Mn-doped ZnO. Journal of Applied Physics, 97(10): 10D303