Serguei Granovsky

 

Research associate (Chair of Magnetism)

Candidate of physical and mathematical science

 (Ph.D. degree) (2000)

 

 

Postal address

Laboratory of Problems for Magnetism,
Faculty of Physics, M.V. Lomonosov Moscow State University, Vorobjovy gory, 119992 Moscow, Russia

Telephone

+7 (095) 939 1145

FAX

+7 (095) 939 5907

E-mail

ser@plms.phys.msu.su

 

Research interests

·        Magnetic properties of metals, alloys and intermetallic compounds, magnetoelastic phenomena, magnetic and structural phase transitions.

·        Technology of metals, alloys and intermetallic compounds.

Main directions of the research activity

·        Study of the magnetic properties of binary and ternary rare earth intermetallic compounds with manganese.

·        Study of the magnetoelastic properties and peculiarities of the magnetic ordering in compounds of the RB6 series.

Main accomplishments

-        Finding and investigation of the strongly enhanced thermal-expansion coefficient (~50´10‑6) in binary R-Mn intermetallics in the paramagnetic temperature region.

-        Study of the magnetic and magnetoelastic properties of the single crystal of TbB6. Study of the magnetoelastic lattice distortions in the DyB6 hexaboride (Fig. 7).

 

 

 

Fig. 7. Transformation of the X-ray diffraction peak (110) of DyB6 in the paramagnetic (above TQ), quadrupolar (between TQ = 32 K and TN = 23 K), and antiferromagnetic (below TN) phases. In the quadrupolar phase, the distorted rhombohedral and cubic paramagnetic phases co-exist in the sample. The low-temperature magnetostriction constant, l111 = 9´10‑3, has the highest value known for cubic compounds so far [S.A. Granovsky, A.S. Markosyan, JMMM (2003) accepted for publication].

 

 

Educational and teaching work

Curator of a student group.

Instructor in the student practical laboratory

 

Total number of publications in refereed journals: 7

 

Some recent publications

1.      S.A. Granovsky, M. Amara, R.M. Galera, S. Kunii, Magnetic and magneto-elastic properties of a single crystal of TbB6, J. Phys.: Condens. Matter 13 (2001) 6307-6321.

2.      I.S. Dubenko, I.Yu. Gaidukova, S.A. Granovsky, V. Rodimin, A.S. Markosyan, S. Roy, N. Ali, Magnetic properties of the RNi4Mn (R = Gd, Tb, Dy, Ho, Er, Tm and Y) intermetallics, IEEE Trans. Magn. 36 (2000) 3336-3338.

3.      I.Yu. Gaidukova, Guo Huan Hua, S.A. Granovsky, I.S. Dubenko, R.Z. Levitin, A.S. Markosyan, V.E. Rodimin, X-ray study of magnetic phase transitions in RMn2Ge2 intermetallics (R = La, Sm, Gd, Nd, Tb, Y), Fiz. Tverd. Tela 41 (1999) 2053-2058 (in Russian) [Phys. Sol. State 41 (1999)].

4.      I.S. Dubenko, I.Yu Gaidukova, S.A. Granovsky, R.Z. Levitin, A.S. Markosyan, A.B. Petropavlovsky, V.E. Rodimin, V.V. Snegirev, High temperature thermal expansion of RMn2 intermetallic compounds with heavy rare earth elements, In: Itinerant Electron Magnetism: Fluctuation Effects, Eds. D. Wagner, W. Brauneck and A. Solontsov, Kluwer Academic Publishers, Dordrecht, 1998, pp.261-267.

5.      E. Gratz, D. Gurjazkas, H. Mьller, A. Kottar, I.S. Dubenko, S.A. Granovsky, A.S. Markosyan, Anomalous thermal expansion in YMn2, Y6Mn23 and YMn12, Physica B 237-238 (1997) 474-475.

6.      I.S. Dubenko, I.Yu. Gaidukova, S.A. Granovsky, E. Gratz, D. Gurjazkas, A.S. Markosyan, H. Mueller, Strongly enhanced thermal expansion in binary Y-Mn intermetallic compounds YMn2, Y6Mn23 and YMn12, Solid State Commun. 103 (1997) 495-499.

7.      I.S. Dubenko, S.A. Granovsky, E. Gratz, R.Z. Levitin, A. Lindbaum, A.S. Markosyan, Enhanced paramagnetic thermal expansion of the intermetallic compounds Y6(Mn1‑xAlx)23, J. Magn. Magn. Mater. 157/158 (1996) 629-630.