Neutron Diffraction Investigation of the DyFe11Ti Magnetic Structure and Its Spin Reorientations

Olivier Isnard; Eder J. Kinast

doi:10.1016/j.eng.2019.11.009

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Engineering ›› 2020, Vol. 6 ›› Issue (2) : 153-157. DOI: 10.1016/j.eng.2019.11.009

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Neutron Diffraction Investigation of the DyFe11Ti Magnetic Structure and Its Spin Reorientations

Olivier Isnard^a ,
Eder J. Kinast^b

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Abstract

In this article, we report on the magnetic structure of DyFe₁₁Ti and its thermal evolution as probed by neutron powder diffraction. A thermodiffraction technique was used to follow the temperature dependence of the magnetic moments, as well as their orientation. The Dy and Fe moments were coupled to each other in an antiparallel manner to form a ferrimagnet, where the easy magnetization direction at 2 K was the [110] axis in the basal (a, b) plane. This magnetic structure underwent two successive spin reorientation phenomena with increasing temperature. A large Dy magnetic moment of 9.7 μ_B was obtained at low temperatures, and the magnitude decreased rapidly to 7.5 μ_B at 200 K. The largest Fe magnetic moment was observed on the Fe 8i position. A ThMn₁₂-type crystal structure was preserved in the studied temperature range, despite the large changes of the magnetic structure. A sharp tilt was observed at the first-order spin reorientation, T_SR1; the angle between the easy magnetization axis and the crystal c axis was reduced from 90° at 2 K to about 20° at 200 K (where c is the easy axis above 200 K); and the Dy and Fe magnetic moments maintained an antiparallel coupling.

Keywords

Neutron diffraction / Magnetic phase diagram / Crystal structure

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Olivier Isnard, Eder J. Kinast. Neutron Diffraction Investigation of the DyFe11Ti Magnetic Structure and Its Spin Reorientations. Engineering, 2020, 6(2): 153‒157 https://doi.org/10.1016/j.eng.2019.11.009

References

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[1]	Buschow KHJ. Permanent magnet materials based on tetragonal rare earth compounds of the type RFe12xMx. J Magn Magn Mater 1991;100(1–3):79–89.

[2]	Li HS, Coey JMD. Magnetic properties of ternary rare-earth transition-metal compounds. In: Buschow KHJ, editor. Handbook of magnetic materials, vol 6. Amsterdam: Elsevier; 1991.

[3]	Buschow KHJ, editor. Electronic and magnetic properties of metals and ceramics, part II. In: Cahn RW, Haasen P, Kramer EJ, editors. Materials science and technology—a comprehensive treatment, vol. 3B. Berlin: VCH Publishing; 1994.

[4]	Isnard O, Miraglia S, Guillot M, Fruchart D. Hydrogen effects on the magnetic properties of RFe11Ti compounds. J Alloys Compd 1998;275– 277:637–41.

[5]	Nikitin SA, Tereshina IS, Verbetsky VN, Salamova AA. Transformations of magnetic phase diagram as a result of insertion of hydrogen and nitrogen atoms in crystalline lattice of RFe11Ti compounds. J Alloys Compd 2001;316(1– 2):46–50.

[6]	Florio JV, Rundle RE, Snow AI. Compounds of thorium with transition metals. I. the thorium-manganese system. Acta Crystallogr 1952;5(4):449–57.

[7]	Isnard O, Guillot M. On the magnetic properties of RFe11TiHx compounds. J Optoelectron Adv Mater 2008;10(4):744–9.

[8]	Hu BP, Li HS, Coey JMD. Relationship between ThMn12 and Th2Ni17 structure types in the YFe11xTix alloy series. J Appl Phys 1990;67(9):4838–40.

[9]	Hu BP, Li HS, Coey JMD, Gavigan JP. Magnetization of a Dy(Fe11Ti) single crystal. Phys Rev B Condens Matter 1990;41(4):2221–8.

[10]	Andreev AV, Bartashevich MI, Kudrevatykh NV, Razgonyaev SM, Sigaev SS, Tarasov EN. Magnetic and magnetoelastic properties of DyFe11Ti single crystals. Phys B 1990;167(2):139–44.

[11]	Tereshina IS, Telegina IV, Skokov KP. Investigation of spin-reorientation phase transitions in single-crystal DyFe11Ti. Phys Solid State 1998;40(4):643–4.

[12]	Piquer C, Isnard O, Grandjean F, Long GJ. Magnetic and Mössbauer spectral properties of DyFe11Ti and DyFe11TiH. J Magn Magn Mater 2003;265(2):156–66.

[13]	Kuz’min MD. On the gradual character of the first-order spin reorientation transition in DyFe11Ti. J Appl Phys 2000;88(12):7217–22.

[14]	Kuz’min MD, García LM, Artigas M, Bartolomé J. Ac susceptibility of a DyFe11Ti single crystal. Phys Rev B Condens Matter 1996;54(6):4093–100.

[15]	Rodríguez-Carvajal J. Recent advances in magnetic structure determination by neutron powder diffraction. Phys B 1993;192(1–2):55–69.

[16]	Isnard O, Fruchart D. Magnetism in Fe-based intermetallics: relationships between local environments and local magnetic moments. J Alloys Compd 1994;205(1–2):1–15.

[17]	Piquer C, Grandjean F, Isnard O, Long GJ. An analysis of the hyperfine parameters of the RFe11Ti and RFe11TiH compounds, where R is a rare-earth element. J Phys Condens Matter 2006;18(1):205–19.

[18]	Piquer C, Grandjean F, Isnard O, Long GJ. A phenomenological model for the rare-earth contribution to the magnetic anisotropy in RFe11Ti and RFe11TiH. J Phys Condens Matter 2006;18(1):221–42.

[19]	García LM, Bartolomé J, Algarabel PA, Ibarra MR, Kuz’min MD. Spontaneous and field induced spin reorientation transitions of DyFe11Ti single crystal. J Appl Phys 1993;73(10):5908–10.

[20]	Zubenko VV, Tereshina IS, Telegina IV, Tereshina EA, Luchev DO, Pankratov NY. Specific features in thermal expansion of RFe11Ti single crystals. Phys Sol State 2001;43(7):1273–7.

[21]	Nikitin SA, Tereshina IS, Pankratov NY. Magnetostriction in the vicinity of the spin-reorientation phase transitions in single crystal DyFe11Ti. Phys Sol 1999;41(9):1508–10.