Vol. 6, №1, 2014
РусскийEnglish
PHYSICS OF THE CONDENSED STATE
HIGH PRESSURE PHASES IN PSEUDO-BINARY SYSTEMS OF RARE-EARTH INTERMETALLICS
Ilyushin A. S.
Institute of Nanotechnology of Microelectronics, Russian Academy of Science,
1/2, Leninskie Gory, 119991 Moscow, Russian Federation,
Umkhaeva Z. S.
Chechen State University,
33, Kievskaya str., 364907 Grozny, Russian Federation,
The goals of research were: 1) synthesis of high pressure phases, 2) study of the rare phase composition, 3) study of the rare magnetic and sorption properties, 4) building of phase diagrams for pseudobinary systems in coordinates “composition-pressure”. Experimental methods for this research were: 1) X-ray diffractometry of polycrystals, 2) magnetic measurements, 3) Mцssbauer spectroscopy. In frames of this research were synthesized high pressure phases in intermetallic comounds of stoichiometry RT2 and in alloys of pseudobinary systems on their base like R’1-xR”xT2 and R(T’1-xT”x)2. Using this unique method of fabrication of high pressure phases there were found the possibilities to produce intermetallec comounds with the same chemical composition in two different structure modifications, i.e. to make “artificial” polymorphism and studied their magnetic and sorption properties.
Keywords : rare-earth intermetallics, pseudobinary systems of alloys, Laves phases, high-pressure phases, X-ray diffractometry, magnetic measurements, Mцssbauer spectroscopy, phase diagrams, polymorphic modifications, crystal structural parameters, giant magnetostriction, giant magnetic anisotropy, sorption of hydrogen and deuterium.
UDC 539.172
Bibliography– 11 references
Received 18.04.2011, revised 10.05.2011
RENSIT, 2011, 3(1):25-33
REFERENCES
- Ilyushin AS. Vvedenie v strukturnuyu fiziku redkozemel’nykh intermetallicheskikh soedineniy [Introduction to structural physics of rare earth intermetallic compounds]. Moscow, MSU Publ., 1991, 176 p.
- Teylor KNR. Intermetallic rare-earth compounds. London, Wiley, 1971, 213 p.
- Wallace WE. Rare-earth intermetallics. N-Y, London, Academic Press, 1973, 266 p.
- Belov KP. Redkozemel’nye magnetiki i ikh primenenie [Rare earth magnetics and their application]. Moscow, Nauka Publ., 1980, 239 p.
- Alefeld G, Felkl I, eds. Vodorod v metallakh [Hydrogen in metalls]. Moscow, Mir Publ., 1981, 1, 475 p; 2, 430 p.
- Belov KP. Magnetostrikzionnye yavleniya i ikh tekhnicheskie prilozheniya [Magnetostrictive phenomena and their technological applications]. Moscow, Nauka Publ., 1987, 160 p.
- Strong G. Vysokotemperaturnye metody pri vysokikh davleniyakh [High-temperature methods at high pressures]. Moscow, Mir Publ., 1964, 192 p.
- Shinyaev AYa. Fazovye prevrascheniya i svoystva splavov pri vysokom davlenii [Phase transformations and properties of alloys at high pressure]. Moscow, Nauka Publ., 1973, 153 p.
- Khvostantsev LG, Vereshchagin LF, Novikov AP. High Temp.-High Pressures, 1977, 9(6):637-639.
- Inoue K, Nakamura Y, Tsvyaschenko AV, Fomicheva MV. J. Magn. & Magn. Mater., 1995, 140:797-798.
- Ilyushin AS, Nikanorova IA, Zvyaschenko AV, Vinogradova AS, Fomicheva MV, Spazhakin IV. Vestnik MGU. Ser. 3. Fizika. Astronomiya, 2004, (2):51-54 (in Russ.).