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 MSA  Vol.11 No.7 , July 2020
Co-Doped Rare-Earth (La, Pr) and Co-Al Substituted M-Type Strontium Hexaferrite: Structural, Magnetic, and Mossbauer Spectroscopy Study
Abstract: The present study investigates the influence of La3+ and Pr3+ doping on the structural, magnetic properties, and hyperfine fields of Sr0.7RE0.3Fe12-2x CoxAlxO19, (RE: La3+ and Pr3+, x = 0.0 - 0.8) hexaferrite compounds prepared via auto-combustion technique. The XRD analysis shows a linear decrease in a and c lattice and unit cell volume contraction with the content x. The room temperature magnetic study shows that for the Pr3+ doped Sr0.7Pr0.3Fe12-2x CoxAlxO19 (Pr3+-SrM), the magnetization value monotonically decreases while for La3+ doped Sr0.7La0.3Fe12-2xCoxAlxO19 (La3+-SrM) magnetization value shows a noticeable increase in magnetization value with x. The coercivity of the Pr3+-SrM compound was observed to decrease while that of the La3+-SrM compound showed a marked 40% increase at x = 0.2 (~5829 Oe) in comparison to undoped SrFe12O19 (~3918 Oe). A difference in Curie temperature was also observed, with Tc ~ 525°C at x = 0.4 for Pr3+-SrM and Tc = 505°C for x = 0.4 for La3+-SrM compound. The observed differences in magnetic properties have been explained on the basis of the site occupancy of Co2+ and Al3+ in the presence of rare-earth ions. The presence of non-magnetic rare-earth ion, La3+, improved saturation magnetization, and coercivity and deemed suitable replacement for Sr2+. The hyperfine parameters namely quadrupole shift showed a decrease with the La3+ or Pr3+ doping independent of (Co2+-Al3+) ions doping. Overall, the Mossbauer analysis suggests that the (Co2+-Al3+) impurities prefer occupancy at 2a site.
Cite this paper: Ghimire, M. , Kunwar, D. , Dahal, J. , Neupane, D. , Yoon, S. and Mishra, S. (2020) Co-Doped Rare-Earth (La, Pr) and Co-Al Substituted M-Type Strontium Hexaferrite: Structural, Magnetic, and Mossbauer Spectroscopy Study. Materials Sciences and Applications, 11, 474-493. doi: 10.4236/msa.2020.117033.
References

[1]   Chen, N., Yang, K. and Mingyuan, G. (2010) Microwave Absorption Properties of La-Substituted M-Type Strontium Ferrites. Journal of Alloys and Compounds, 490, 609-612.
https://doi.org/10.1016/j.jallcom.2009.10.116

[2]   Riches, E.E. (1972) Ferrites: A Review of Materials and Applications. 3rd Edition, Mills & Boon, Richmond.

[3]   Chin, T.-S. (2000) Permanent Magnet Films for Applications in Microelectromechanical Systems. Journal of Magnetism and Magnetic Materials, 209, 75-79.
https://doi.org/10.1016/S0304-8853(99)00649-6

[4]   Hernandez, P., De Francisco, C., Munoz, J.M., Iniguez, J., Torres, L. and Zazo, M. (1996) Influence of Sintering Atmosphere on the Magnetic After-Effect in Strontium Ferrites. Journal of Magnetism and Magnetic Materials, 157-158, 123-124.
https://doi.org/10.1016/0304-8853(95)01070-X

[5]   Jin, Z.Q., Tang, W., Zhang, J.R., Lin, H. and Du, Y.W. (1998) Magnetic Properties of Isotropic SrFe12O19 Fine Particles Prepared by Mechanical Alloying. Journal of Magnetism and Magnetic Materials, 182, 231-237.
https://doi.org/10.1016/S0304-8853(97)00679-3

[6]   Qiao, L., You, L., Zheng, J., Jiang, L. and Sheng, J. (2007) The Magnetic Properties of Strontium Hexaferrites with La-Cu Substitution Prepared by SHS Method. Journal of Magnetism and Magnetic Materials, 318, 74-78.
https://doi.org/10.1016/j.jmmm.2007.04.028

[7]   Besenicar, S. and Miha, D. (1991) High Coercivity Sr Hexaferrites. Journal of Magnetism and Magnetic Material, 101, 307-309.
https://doi.org/10.1016/0304-8853(91)90763-Z

[8]   Rezlescu, L., Rezlescu, E., Popa, P.D. and Rezlescu, N. (1999) Fine Barium Hexaferrite Powder Prepared by the Crystallization of Glass. Journal of Magnetism and Magnetic Materials, 193, 288-290.
https://doi.org/10.1016/S0304-8853(98)00442-9

[9]   Zhong, W., Ding, W.P., Zhang, N., Hong, J.M., Yan, Q.J. and Du, Y.W. (1997) Key Step in Synthesis of Ultrafine BaFe12O19 by Sol-Gel Technique. Journal of Magnetism and Magnetic Materials, 168, 196-202.
https://doi.org/10.1016/S0304-8853(96)00664-6

[10]   Kojima, H. (1982) Chapter 5. Fundamental Properties of Hexagonal Ferrites with Magnetoplumbite Structure. In: Handbook of Ferromagnetic Materials, Elsevier, Amsterdam, Vol. 3, 305-391.
https://doi.org/10.1016/S1574-9304(05)80091-4

[11]   Luo, H., Rai, B.K., Mishra, S.R., Nguyen, N.N. and Liu, J.P. (2012) Physical and Magnetic Properties of Highly Aluminum Doped Strontium Ferrite Nanoparticles Prepared by Auto-Combustion Route. Journal of Magnetism and Magnetic Materials, 324, 2602-2608.
https://doi.org/10.1016/j.jmmm.2012.02.106

[12]   Shirtcliffe, N.J., Thompson, S., O’keefe, E.S. Appleton, S. and Perry, C.C. (2007) Highly Aluminium Doped Barium and Strontium Ferrite Nanoparticles Prepared by Citrate Auto-Combustion Synthesis. Materials Research Bulletin, 42, 281-287.
https://doi.org/10.1016/j.materresbull.2006.06.001

[13]   Fang, Q.Q., Liu, Y.M., Yin, P. and Li, X.G. (2001) Magnetic Properties and Formation of Sr Ferrite Nanoparticle and Zn, Ti/Ir Substituted Phases. Journal of Magnetism and Magnetic Materials, 234, 366-370.
https://doi.org/10.1016/S0304-8853(01)00428-0

[14]   Iqbal, M.J., Ashiq, M.N., Gomes, P.H. and Munoz, J.M. (2008) Synthesis, Physical, Magnetic and Electrical Properties of Al-Ga Substituted Co-Precipitated Nanocrystalline Strontium Hexaferrite. Journal of Magnetism and Magnetic Materials, 320, 881-886.
https://doi.org/10.1016/j.jmmm.2007.09.005

[15]   Albanese, G., Carbucicchio, M. and Deriu, A. (1974) Temperature Dependence of the Sublattice Magnetizations in Al- and Ga-Substituted M-Type Hexagonal Ferrites. Physica Status Solidi, 23, 351-358.
https://doi.org/10.1002/pssa.2210230202

[16]   Ashiqa, M.N., Iqbalb, M.J. and Gulc, I.H. (2009) Structural, Magnetic and Dielectric Properties of Zr-Cd Substituted Strontium Hexaferrite (SrFe12O19) Nanoparticles. Journal of Alloys and Compounds, 487, 341-345.
https://doi.org/10.1016/j.jallcom.2009.07.140

[17]   Le Breton, J.M., Teillet, J., Wiesinger, G., Morel, A., Kools, F. and Tenaud, P. (2002) Mossbauer Investigation of Sr-Fe-O Hexaferrites with La-Co Addition. IEEE Transactions on Magnetics, 38, 2952-2954.
https://doi.org/10.1109/TMAG.2002.803177

[18]   Nourbakhsh, A.A., Noorbakhsh, M., Nourbakhsh, M., Shaygan, M. and Mackenzie, K.J.D. (2011) The Effect of Nano Sized SrFe12O19 Additions on the Magnetic Properties of Chromium-Doped Strontium-Hexaferrite Ceramics. Journal of Materials Science: Materials in Electronics, 22, 1297-1302.
https://doi.org/10.1007/s10854-011-0303-3

[19]   Liu, X.S., Zhong, W., Yang, S., Yu, Z., Gu, B.X. and Du, Y. (2002) Structure and Magnetic Properties of La3+-Substituted Strontium Hexaferrite Particles Prepared by Sol-Gel Method. Physica Status Solidi, 193, 314-319.
https://doi.org/10.1002/1521-396X(200209)193:2<314::AID-PSSA314>3.0.CO;2-W

[20]   Dahal, J.N., Neupane, D. and Mishra, S.R. (2019) Exchange-Coupling Behavior in SrFe12O19/La0.7Sr0.3Mno0.3 Nanocomposites. Ceramics, 2, 100-111.
https://doi.org/10.3390/ceramics2010010

[21]   Mocuta, H., Lechevallier, L., Le Breton, J.M., Wang, J.F. and Harris, I.R. (2004) Structural and Magnetic Properties of Hydrothermally Synthesised Sr1-xNdxFe12O19 Hexagonal Ferrites. Journal of Alloys and Compounds, 364, 48-52.
https://doi.org/10.1016/S0925-8388(03)00545-0

[22]   Lechevallier, L., Le Breton, J.M., Wang, J.F. and Harris, I.R. (2004) Structural and Magnetic Properties of Hydrothermally Synthesised Sr1-xNdxFe12O19 Hexagonal Ferrites. Journal of Magnetism and Magnetic Materials, 269, 192-196.
https://doi.org/10.1016/S0304-8853(03)00591-2

[23]   Wang, J.F., Ponton, C.B. and Harris, I.R. (2001) A Study of the Magnetic Properties of Hydrothermally Synthesised Sr Hexaferrite with Sm Substitution. Journal of Magnetism and Magnetic Materials, 234, 233-240.
https://doi.org/10.1016/S0304-8853(01)00366-3

[24]   Lechevallier, L., Le Breton, J.M., Morel, A. and Tenaud, P. (2008) On the Solubility of Rare Earths in M-Type SrFe12O19 Hexaferrite Compounds. Journal of Physics: Condensed Matter, 20, Article ID: 175203.
https://doi.org/10.1088/0953-8984/20/17/175203

[25]   Polyko, D.D., Bashkirov, L.A., Trukhanov, S.V., Lobanovskii, L.S. and Sirota, I.M. (2011) Crystal Structure and Magnetic Properties of High-Coercivity Sr1-xPrx Fe12-xZnxO19 Solid Solutions. Inorganic Materials, 47, 77-79.
https://doi.org/10.1134/S0020168511010110

[26]   Yang, Y.J. and Liu, X.S. (2014) Microstructure and Magnetic Properties of La-Cu Doped M-Type Strontium Ferrites Prepared by Ceramic Process. Materials Technology, 29, 232-236.

[27]   Corral Huacuz, J.C. and Mendoza-Suárez, G. (2002) Preparation and Magnetic Properties of Ir-Co and La-Zn Substituted Barium Ferrite Powders Obtained by Sol-Gel. Journal of Magnetism and Magnetic Materials, 430, 430-433.
https://doi.org/10.1016/S0304-8853(01)01141-6

[28]   Torkian, S., Ghasemi, A., Shojarazavi, R. and Tavoosi, M. (2016) Structural and Magnetic Properties of High Coercive Al-Substituted Strontium Hexaferrite Nanoparticles. Journal of Superconducativity and Novel Magnetism, 29, 1627-1640.
https://doi.org/10.1007/s10948-016-3450-1

[29]   Trusov, L.A., Gorbachev, E.A., Lebedev, V.A., Sleptsova, A.E., Roslyakov, I.V., Kozlyakova, E.S., Vasiliev, A.V., Dinnebier, R.E. Jansen, M. and Kazin, P.E. (2018) Ca-Al Double-Substituted Strontium Hexaferrites with Giant Coercivity, Chemical Communications, 54, 479-482.
https://doi.org/10.1039/C7CC08675J

[30]   Narang, S.B., Singh, A. and Singh, K. (2014) High Frequency Dielectric Behavior of Rare Earth Substituted Sr-M Hexaferrite. Journal of Ceramic Processing Research, 8, 347.

[31]   Shannon, R.D. (1976) Revised Effective Ionic Radii and Systematic Studies of Interatomic Distances in Halides and Chalcogenides. Acta Crystallographica, A32, 751-767.
https://doi.org/10.1107/S0567739476001551

[32]   Wagner, T.R. (1998) Preparation and Crystal Structure Analysis of Magnetoplumbite-Type Baga12O19. Journal of Solid State Chemistry, 136, 120-124.
https://doi.org/10.1006/jssc.1997.7681

[33]   Cullity, B.D. (1956) Elements of X-Ray Diffraction. 2nd Edition, Addison-Wesley Publishing, Boston.

[34]   Dahal, J.N., Wang, L., Mishra, S.R., Nguyen, V.V., and Liu, J.P. (2014) Synthesis and Magnetic Properties of SrFe12-x-yAlxCoyO19 Nanocomposites Prepared via Autocombustion Technique. Journal of Alloys and Compounds, 595, 213-220.
https://doi.org/10.1016/j.jallcom.2013.12.186

[35]   Zi, Z.F., Sun, Y.P., Zhu, X.B., Yang, Z.R. and Song, W.H. (2008) Structural and Magnetic Properties of SrFe12O19 Hexaferrite Synthesized by a Modified Chemical Co-Precipitation Method. Journal of Magnetism and Magnetic Materials, 320, 2746-2751.
https://doi.org/10.1016/j.jmmm.2008.06.009

[36]   Wiesinger, G., Muller, M., Grossinger, R., Pieper, M., Morel, A., Kools, F., Tenad, P., Le Breton, J.M. and Kreisel, J. (2002) Substituted Ferrites Studied by Nuclear Methods. Physica Status Solidi, 189, 499-508.
https://doi.org/10.1002/1521-396X(200202)189:2<499::AID-PSSA499>3.0.CO;2-H

[37]   Lechevallier, L., Le Breton, J.M., Teillet, J. Morel, A., Kools, F. and Tenaud, P. (2003) Mossbauer Investigation of Sr1-xLaxFe12-yCoyO19 Ferrites. Physica B: Condensed Matter, 327, 135-139.
https://doi.org/10.1016/S0921-4526(02)01712-X

[38]   Le Breton, J.-M., Teillet, J., Wiesinger, G., Morel, A., Kools, F. and Tenaud, P. (2002) Mossbauer Investigation of Sr-Fe-O Hexaferrites La-Co Addition. IEEE Transactions on Magnetics, 38, 2952-2954.
https://doi.org/10.1109/TMAG.2002.803177

[39]   Kools, F. ((1985) Factors Governing the Coercivity of Sintered Anisotropic M Type Ferrite. Le Journal de Physique Colloques, 46, 346-349.

[40]   Zhou, X.Z., Morrish, A.H., Li, Z.W. and Hong, Y.K. (1991) Site Preference for Co2+ and Ti4+ in Co-Ti Substituted Barium Ferrites. IEEE Transactions on Magnetics, 27, 4654-4656.
https://doi.org/10.1109/20.278906

[41]   Han, D.H., Yang, Z., Zeng, H.X., Zhou, X.Z. and Morrish, A.H. (1994) Cation Site Preference and Magnetic Properties of Co-Sn-Substituted Ba Ferrites Particles. Journal of Magnetism and Magnetic Materials, 137, 191-196.
https://doi.org/10.1016/0304-8853(94)90205-4

[42]   Choi, D.H., An, S.Y., Lee, S.W., Shim, I.-B. and Kim, C.S. (2004) Site Occupancy and Anisotropy Distribution of Al Substituted Ba-Ferrite with High Coercivity. Physica State Solid, 241, 1736-1739.
https://doi.org/10.1002/pssb.200304633

[43]   Albanese, G. (1995) Mossbauer Investigation of Aluminium Substituted Barium Hexaferrites in the Paramagnetic State. Journal of Magnetism and Magnetic Materials, 147, 421-426.
https://doi.org/10.1016/0304-8853(95)00063-1

[44]   Lechevallier, L., Le Breton, J.M., Morel, A. and Tenaud, P. (2007) Influence of the Presence of Co on the Rare Earth Solubility in M-Type Hexaferrite Powders. Journal of Magnetism and Magnetic Materials, 316, e109-e111.
https://doi.org/10.1016/j.jmmm.2007.02.042

[45]   Ghimire, M., Yoon, S., Wang, S.L., Neupane, D., Alam, J. and Mishra, S.R. (2018) Influence of La Content on Magnetic Properties of Cu Doped M-Type Strontium Hexaferrite: Structural, Magnetic, and Mossbauer Spectroscopy Study. Journal of Magnetism and Magnetic Materials, 454, 110-120.
https://doi.org/10.1016/j.jmmm.2018.01.062

[46]   Kunwar, D.L., Neupane, D., Dahal, J.N. and Mishra, S.R. (2019) Structural, Magnetic, and Electrical Properties of Re Doped Sr0.82Re0.18Fe12-xAlxO19 (Re = Gd, Pr, Sm) Compound. Advances in Materials Physics and Chemistry, 9, 175.
https://doi.org/10.4236/ampc.2019.99014

[47]   Evans, B.J., Grandjean, F., Lilot, A.P., Vogel, R.H. and Gerard, A. (1987) 57Fe Hyperfine Interaction Parameters and Selected Magnetic Properties of High Purity MFe12O19 (M = Sr, Ba). Journal of Magnetism and Magnetic Materials, 67, 123-129.
https://doi.org/10.1016/0304-8853(87)90728-1

[48]   Wartewig, P., Krause, M.K., Esquinazi, P., Rosler, S. and Sonntag, R. (1999) Magnetic Properties of Zn- and Ti-Substituted Barium Hexaferrite. Journal of Magnetism and Magnetic Materials, 192, 83-99.
https://doi.org/10.1016/S0304-8853(98)00382-5

[49]   Obradors, X., Solans, X.A., Collomb, D., Samaras, J., Rodriguez, M., Pernet, M. and Font-Altaba, M. (1988) Crystal Structure of Strontium Hexaferrite SrFe12O19. Journal of Solid State Chemistry, 72, 218-224.
https://doi.org/10.1016/0022-4596(88)90025-4

[50]   Dixit, V., Nandadasa, C.N., Kim, S.G., Kim, S., Park, J., Hong, Y.K. and Moitra, A. (2015) Site Occupancy and Magnetic Properties of Al-Substituted M-Type Strontium Hexaferrite. Journal of Applied Physics, 117, Article ID: 243904.
https://doi.org/10.1063/1.4922867

[51]   Lechevallier, L. and Le Breton, J.M. (2005) Substitution Effects in M-Type Hexaferrite Powders Investigated by Mossbauer Spectrometry. Journal of Magnetism and Magnetic Materials, 290, 1237-1239.
https://doi.org/10.1016/j.jmmm.2004.11.411

 
 
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