Magnetic Phase Transitions in Nanosystems: Role of Size Effects, Intercluster Interactions and Defects
Source abstract
Abstract
Shear stress under high pressure loaded nanoclusters of α, γ-ferric oxides and metallic europium showed first- and second-order magnetic phase transitions. For nanoclusters of α, γ-ferric oxides and metallic europium 57Fe and 151Eu, Mossbauer spectroscopy revealed a considerable change in the Curie (Neel) points. The thermodynamic model predicts first-to-second-order (Eu) and second-to-first-order (Fe oxides) changes in the character of magnetic phase transitions and a decrease or increase of critical Curie (Neel) points. The model defines the critical cluster size and concentration of defects in nanosystems responsible for the change in magnetic properties. For nanoclusters of Fe oxides and metallic Eu, the critical (and maximum) concentration of defects corresponds to a cluster size 20–50nm.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: High-pressure geophysics and materials · nanoparticles nucleation surface interactions · Advanced Chemical Physics Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (25)
Show source-provided references
1. Alivisatos A.P., 1996. Semiconductor cluster nanosystems and quantum dots. Science 271, 933–937.10.1126/science.271.5251.933 ↗
2. Barret P.H. & D.A. Shirly, 1963. Hyperfine structure in europium metal. Phys. Rev. 131, 123–127.10.1103/PhysRev.131.123 ↗
3. Bean C.B'. & D.S. Rodbell, 1962. Magnetic disorder as first-order phase transition. Phys. Rev. 126, 104–118.10.1103/PhysRev.126.104 ↗
4. Berry R.S. & H. Haberland, 1994. What are clusters? In: Haberland H. ed. Clusters of Atoms and Molecules. Springer-Verlag, Berlin, Heidelberg, pp. 1–12.
5. Billas I.M., J.A. Becker, A. Chatelain & W.A. de Heer, 1993. Magnetic moments of iron clusters with 25 to 700 atoms and their dependence on temperature. Phys. Rev. Lett. 71, 4067–4070.10.1103/PhysRevLett.71.4067 ↗
6. Cox A.J., J.G. Lounerback, S. Eapsel & L.A. Bloomfield, 1994. Magnetism in 4d-transition clusters. Phys. Rev. B 49, 12295–12297.10.1103/PhysRevB.49.12295 ↗
7. Jin S., T.H. Tiefel, M.Mc. Cornack, R.A. Fastnacht, R. Ramesh & L.H. Chen, 1994. Thousandfold change in resistivity in magnetoresistive La-Ca-Mn-O films. Science 264, 413–415.10.1126/science.264.5157.413 ↗
8. Kazakevich A.G., A.A. Zharov, P.A. Yampolskii & N.S. Enikolopian, 1974. Kinetic of polymerization of acrylamide under condition of high pressure with shears. Docl. Chem. 215, 1404–1406.
9. Krupianskii Yu.F. & I.P. Suzdalev, 1974. Magnetic properties of ultrafine iron oxide particles. Sov. Phys.-JETP. 38, 859–864.
10. Ofer S., I. Novik & S. Cohen, 1968. Mossbauer effect in rare earth elements and compounds. In: Goldanskii V.I. and Herber R.H. eds. Chemical Applications of Mossbauer Spectroscopy. Academic Press, New York, London, pp. 336–397.
11. Petit C., A. Taleb & M.P. Pileni, 1999. Cobalt nanosized particles organized in 2D superlattice: Synthesis, characterization and magnetic properties. J. Phys. Chem. B 103, 1805–1815.10.1021/jp982755m ↗
12. Schmid G., 1998. The role of big metal clusters in nanoscience. J. Chem. Soc., Dalton Trans. 1077–1082.10.1039/a708447a ↗
13. Shi J., S. Gider, K. Babcock & D.D. Amschalom, 1996. Magnetic clusters in molecular beams, metals and semiconductors. Science 271, 937–941.10.1126/science.271.5251.937 ↗
14. Suzdalev I.P., 1970. Superparamagnetism of ultrafine antiferromagnetic particles Sov. Phys.-Sol. St. 12, 775–777.
15. Suzdalev I.P. & P.I. Suzdalev, 2001. Nanoclusters and nanostructure systems. Assembly, interactions and properties. Russ. Chem. Rev. 70, 177–210.10.1070/RC2001v070n03ABEH000627 ↗
16. Suzdalev I.P., V.N. Buravtsev, V.K. Imshennik, Yu.V. Maksimov, S.V. Novichikhin, A.X. Trauwein & H. Winkler, 1996. Magnetic properties of ultrafine ferrihydrite clusters studied by Mossbauer spectroscopy and by thermodynamic analysis. Z. Phys. D 37, 55–61.10.1007/s004600050009 ↗
17. Suzdalev I.P., V.N. Buravtsev, V.K. Imshennik & Yu.V. Maksimov, 2001. Interface-induced magnetic phase transitions in iron oxide nanosystems. Scripta Mater. 44, 1937–1940.10.1016/S1359-6462(01)00816-8 ↗
18. Suzdalev I.P., Yu.V. Maksimov, V.N. Buravtsev, V.K. Imshennik, A.G. Kazakevich & S.V. Novichichin, 2000a. The formation and properties of system of iron oxide nanoclusters. Colloid J. 62, 224–233.
19. Suzdalev I.P., Yu.V. Maksimov, S.V. Novichichin, V.N. Buravtsev, V.K. Imshennik & V.V. Matveev, 2000b. Structural and magnetic phase transitions in iron oxide nano-size systems. Chem. Phys. Reports 19, 401–418.
20. Suzdalev I.P., A.S. Plachinda, V.N. Buravtsev, Yu.V. Maksimov, S.I. Reiman, V.I. Khromov & D.I. Dmitriev, 1998. Magnetic phase transitions in nanoclusters of iron oxyhydroxides in polymeric matrixes. Chem. Phys. Reports 17, 1335–1347.
21. Taylor K.N.R. & M.I. Darby, 1972. Physics of Rare Earth Solids. Chapman and Hall Ltd, London, pp. 193–253.
22. Thomas L., F. Lionti, R. Ballou, D. Gatteschi, R. Sessoli & B. Barbarq, 1996. Macroscopic quantum tunneling of magnetization in a single crystal of nanomagnets. Nature 383, 145–147.10.1038/383145a0 ↗
23. Vassiliou J.K., V. Mehroya, M.W. Russel, R.D. McMichel, R.D. Shull & R.F. Ziolo, 1993. Magnetic and optical properties of alfa ferric oxide nanoclusters. J. Appl. Phys. 73, 5109–5118.10.1063/1.353784 ↗
24. Vonsovskii S.V., 1971. Magnetism. Nauka, Moskva, 1024 pp. (in Russ.).
25. Zharov A.A. & N.P. Chistotina, 1974. The device for shear stress measurements under high pressure. Prib. Tekh. Eksp. 2, 229–233.