Effect of Electric-Spark Dispergation on Magnetic and Electrical-Transport Properties of Heusler Cu—Mn—Al Alloy

V. M. Nadutov$^{1}$, A. O. Perekos$^{1}$, V. V. Kokorin$^{2}$, S. M. Konoplyuk$^{2}$, T. V. Yefimova$^{1}$, V. P. Zalutskiy$^{1}$

$^{1}$G.V. Kurdyumov Institute for Metal Physics, NAS of Ukraine, 36 Academician Vernadsky Blvd., UA-03680 Kyiv-142, Ukraine
$^{2}$Institute of Magnetism under NAS and MES of Ukraine, 36b Academician Vernadsky Blvd., UA-03680 Kyiv-142, Ukraine

Received: 15.05.2014. Download: PDF

The ultrafine powders (UFP) of the Heusler Cu—13.1 Mn—12.6 Al (% wt.) alloy after electrospark dispergation in various liquids (distilled water, kerosene, and ethanol) and compacted samples are studied. The finer structure as well as the changes of the UFP phase composition and their influence on magnetic and transport properties are revealed. The XRD measurements show that amount of the ordered Cu$_{2}$MnAl phase in the initial and compacted powders is lower than that in the cast material. Because of this fact, the saturation magnetization is decreased by several times. The magnetic measurements show that the particles of the ordered phase are in the superparamagnetic state. The change of the type of electrical conduction of the compacted powders from metallic to semiconducting one is caused by the oxidation of the metal particles during compacting and subsequent sintering.

Key words: структура, електроопір, намагнетованість, високодисперсні порошки, Гойслеровий стоп, електроіскрове дисперґування.

URL: http://mfint.imp.kiev.ua/en/abstract/v36/i12/1679.html

DOI: https://doi.org/10.15407/mfint.36.12.1679

PACS: 61.05.cp, 72.15.Gd, 75.47.Np, 75.50.Tt, 75.60.Ej, 81.07.Wx, 81.40.Rs

Citation: V. M. Nadutov, A. O. Perekos, V. V. Kokorin, S. M. Konoplyuk, T. V. Yefimova, and V. P. Zalutskiy, Effect of Electric-Spark Dispergation on Magnetic and Electrical-Transport Properties of Heusler Cu—Mn—Al Alloy, Metallofiz. Noveishie Tekhnol., 36, No. 12: 1679—1694 (2014) (in Russian)

  1. A. Fert, Uspekhi Fizicheskikh Nauk, 178, No. 12: 1336 (2008) (in Russian). Crossref
  2. Dvoynye i Mnogokomponentnye Sistemy na Osnove Medi (Ed. S. V. Shukharin) (Moscow: Nauka: 1979) (in Russian).
  3. S. M. Konoplyuk, V. V. Kokorin, A. O. Perekos, V. M. Nadutov, and L. E. Kozlova, Metallofiz. Noveishie Tekhnol., 32, No. 5: 571 (2010).
  4. V. V. Nemoshkalenko, A. V. Romanova, A. G. Il'inskiy et al., Amorfnye Metallicheskie Splavy (Kiev: Naukova Dumka: 1987) (in Russian).
  5. K. V. Chuistov, A. P. Shpak, A. E. Perekos, A. D. Rud', and V. N. Uvarov, Uspekhi Fiziki Metallov, 4, No. 4: 235 (2003) (in Russian).
  6. D. Smith et al., International Center for Diffraction Data Crant-in-Aid (University Park, Pennsylvania, USA: Penn. State University: 1973).
  7. T. Shinohara and T. Sato, Science Reports of the Research Institutes, Tohoku University. Ser. A. Physics, Chemistry and Metallurg., 36, No. 2: 316 (1992).
  8. M. Bouchard and G. Thomas, Acta Metall., 23, No. 12: 1485 (1975). Crossref
  9. K. H. J. Buschow, P. G. van Engen, and R. Jongebreur, J. Magn. Magn. Mater., 38, No. 1: 101 (1983). Crossref
  10. K. V. Chuistov and A. E. Perekos, Metallofiz. Noveishie Tekhnol., 19, No. 1: 36 (1997) (in Russian).
  11. J. H. Mooij, physica status solidi (a), 17, No. 2: 521 (1973). Crossref
  12. R. C. Taylor and C. C. Tsuei, Solid State Commun., 41, No. 6: 503 (1982). Crossref
  13. I. Krusin-Elbaum, A. P. Alozemoff, and R. C. Taylor, Phys. Rev. B, 27, No. 1: 562 (1983). Crossref
  14. Y. V. Kudryavtsev, V. A. Oksenenko, N. N. Lee, Y. P. Lee, J. Y. Rhee, and J. Dubowik, J. Appl. Phys., 97, No. 11: 113903 (2005). Crossref
  15. A. A. Shcherba, V. V. Kokorin, A. O. Perekos, L. O. Olikhovska, O. F. Boytsov, and S. M. Zakharchenko, Metallofiz. Noveishie Tekhnol., 29, No. 2: 201 (2007) (in Russian).
  16. A. E. Perekos, V. A. Chernenko, S. A. Bunaev, V. P. Zalutskiy, T. V. Ruzhitskaya, O. F. Boitsov, and G. N. Kakazei, J. Appl. Phys., 112, No. 9: 093909 (2012). Crossref
  17. V. V. Kokorin, Martensitnye Prevrashcheniya v Neodnorodnykh Tverdykh Rastvorakh (Kiev: Naukova Dumka: 1987) (in Russian).
  18. K. V. Chuistov, Starenie Metallicheskikh Splavov (Kiev: Naukova Dumka: 1985) (in Russian).
  19. Yu. I. Petrov, Fizika Malykh Chastits (Moscow: Nauka: 1982) (in Russian).
  20. S. A. Nepiyko, Fizicheskie Svoystva Malykh Metallicheskikh Chastits (Kiev: Naukova Dumka: 1985) (in Russian).
  21. S. V. Vonsovsky, Magnetism (Moscow: Nauka: 1971) (in Russian).
  22. J. Q. Yiao, J. S. Jang, and C. L. Chien, Phys. Rev., 68: 3749 (1992). Crossref