Temperature dependence of ferromagnetic resonance in double perovskite La2NiMnO6 thin films

Abstract

The results of the linewidth analysis of ferromagnetic resonance (FMR) spectra of epitaxial La2NiMnO6 (LNMO) thin films on (100) oriented SrTiO3 and (110) oriented NdGaO3 substrates at different temperature have been presented. Observed two well resolved FMR signals have been attributed to the coexistence two magnetic phases with different easy and hard axis in the film plane of LNMO. The line shape and the linewidth of the ferromagnetic resonance spectra were measured as a function of temperature. Asymmetry ratio of field derivative FMR absorption curve shows unusual behavior with decreasing temperature. This unusual temperature dependency of the FMR linewidth confirms the presence of magnetoelectric effect in epitaxial LNMO thin films grown by pulse laser deposition technique.

Keywords

• Ferromagnetic Resonance
• Double perovskite
• Magnetodielectric
• La2NiMnO6

References

1. [1] M. Fiebig, “TOPICAL REVIEW: Revival of the magnetoelectric effect,” Journal of Physics D: Applied Physics, vol. 38, no. 8, pp. R123-R152, 2005.
2. [2] N. A. Hill, “Why are there so few magnetic ferroelectrics?,” Journal of Physical Chemistry B, vol. 104, no. 29, pp. 6694-6709, 2000.
3. [3] W. Eerenstein, N. Mathur and J. Scott, “Multiferroic and magnetoelectric materials,” Nature, vol. 442, pp. 759–765, 2006.
4. [4] G. Lawes, A. P. Ramirez, C. M. Varma and M. A. Subramanian, “Magnetodielectric effects from spin fluctuations in isostructural ferromagnetic and antiferromagnetic systems,” Physical Review Letters, vol. 91, no. 25, pp. 257208, 2003.
5. [5] J. S. Moodera, X. Hao, G. A. Gibson and R. Meservey, “Electron-spin polarization in tunnel junctions in zero applied field with ferromagnetic EuS barriers,” Physical Review Letters, vol. 61, no. 5, pp. 637-640, 1988.
6. [6] M. Gajek, M. Bibes, A. Barthèlèmy, K. Bouzehouane, S. Fusil, M. Varela, “Spin filtering through ferromagnetic BiMnO3 tunnel barriers,” Physical Review B, vol. 72, no. 2, pp. 020406(R), 2005
7. [7] R. I. Dass, J. Q. Yan and J. B. Goodenough, “Oxygen stoichiometry, ferromagnetism, and transport properties of La2−xNiMnO6+δ,” Physical Review B, vol. 68, no. 6, pp. 064415, 2003.
8. [8] N. S. Rogada, J. Li, A. W. Sleight, M. A. Subramanian, “Magnetocapacitance and magnetoresistance near room temperature in a ferromagnetic semiconductor La2NiMnO6,” Advanced Materials, vol. 17, no. 18, pp. 2225-2227, 2005.

9. [9] H. Guo, J. Burgess, S. Street, A. Gupta, T. G. Calvarese and M. A. Subramanian, “Growth of epitaxial thin films of the ordered double perovskite La2NiMnO6 on different substrates,” Applied Physics Letters, vol. 89, no. 2, pp. 022509, 2006.
10. [10] A. Wold, R. J. Arnott and J. B. Goodenough, “Some magnetic and crystallographic properties of the system LaMn1−xNixO3+λ,” Journal of Applied Physics, vol. 29, no. 3, pp. 387-389, 1958.
11. [11] J. B. Goodenough, A. Wold, R. J. Arnott and N. Menyuk, “Relationship between crystal symmetry and magnetic properties of ionic compounds containing Mn3+,” Physical Review, vol. 124, no. 2, pp. 373-384, 1961.
12. [12] G. Blasse, “Ferromagnetic interactions in non-metallic perovskites,” Journal of Physics and Chemistry of Solids, vol. 26, no. 12, pp. 1969-1971, 1965.
13. [13] K. Asai, H. Sekizawa, and S. Iida, “Magnetization measurements and 55Mn NMR studies of LaNi0.5Mn0.5O3,” Journal of the Physical Society of Japan, vol. (47), no. 4, pp. 1054-1060, 1979.
14. [14] M. Sonobe and K. Asai, “Magnetization measurement and 55Mn NMR study of La(Ni1-xMgx)0.5Mn0.5O3,” Journal of the Physical Society of Japan, vol. 61, no. 11, pp. 4193-4203, 1992.
15. [15] N. Y. Vasanthacharya, P. Ganguly, J. B. Goodenough and C. N. R. Rao, “Valence states and magnetic properties of LaNi1-xMnxO3 (for 0≤x≤0.2 and x=0.5),” Journal of Physics C: Solid State Physics, vol. 17, no. 15, pp 2745-2760, 1984.
16. [16] V. L. Joseph Joly, P. A. Joy, S. K. Date and C. S. Gopinath, “Two ferromagnetic phases with different spin states of Mn and Ni in LaMn0.5Ni0.5O3,” Physical Review B, vol. 65, no. 18, pp. 184416, 2002.
17. [17] CL Bull, D Gleeson and KS Knight, “Determination of B-site ordering and structural transformations in the mixed transition metal perovskites La2CoMnO6 and La2NiMnO6,” Journal of Physics: Condensed Matter, vol. 15, no. 19, pp. 4927-4936, 2003.
18. [18] J. Blasco, M. C. Sánchez, J. Pérez-Cocho, J. García, G. Subía and J. Campo. “Synthesis and structural study of LaNi1−xMnxO3+δ perovskites,” Journal of Physics and Chemistry of Solids, vol. 63 no. 5, pp. 781-792, 2002.
19. [19] S. Kazan, F. A. Mikailzade, M. Özdemir, B. Aktaş, B. Rameev, A. Intepe, A. Gupta. “Ferromagnetic resonance in double perovskite epitaxial thin films of La2NiMnO6 on SrTiO3 and NdGaO3 substrates,” Applied Physics Letters, vol. 97, no. 7, pp. 072511, 2010.
20. [20] M. Belmeguenai, S. Mercone, C. Adamo, L. Méchin, C. Fur, P. Monod, P. Moch and D. G. Schlom, “Temperature dependence of magnetic properties of La0.7Sr0.3MnO3/SrTiO3 thin films on silicon substrates,” Physical Review B, vol. 81, no. 5, pp. 054410, 2010.
21. [21] M. L. Spano and S. M. Bhagat, “Ferromagnetic resonance in amorphous alloys,” Journal of Magnetism and Magnetic Materials, vol. 24, no. 2, pp. 143-156, 1981.
22. [22] M. J. Hurben and C. E. Patton, “Theory of two magnon scattering microwave relaxation and ferromagnetic resonance linewidth in magnetic thin films,” Journal of Applied Physics, vol. 83, no. 8, pp. 4344-4365, 1998.
23. [23] Z. Zhi-Dong, “Spin waves in thin films, superlattices and multilayers in Handbook of thin film materials: Nanomaterials and magnetic thin films,” vol. 5, Academic Press, 2002.
24. [24] F. J. Dyson, “Electron spin resonance absorption in metals. II. Theory of electron diffusion and the skin effect,” Physical Review, vol. 98, no. 2, pp. 349–359, 1955.
25. [25] S. E. Lofland, T. Scabarozi, S. Kale, S. M. Bhagat, S. B. Ogale, T. Venkatesan et al. “Ferromagnetic resonance and magnetization studies on ferrimagnetic double perovskites A2FeReO6 (A=Ca, Sr, Ba),” IEEE Transactions on Magnetics, vol. 37, no. 4, pp. 2153-2155, 2001.