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Irradiation-induced amorphized state of rapidly quenched R 12Fe82B6 alloys (R = Nd, Er)

  • Electrical and Magnetic Properties
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Abstract

Rapidly quenched (RQ) alloys R 12Fe82B6 (R = Nd, Er) have been prepared by melt spinning. Their magnetic properties, structure, and phase composition have been studied before and after fast-neutron irradiation to a fluence of 1.2 × 1020 n/cm2. Before irradiation, it is the Nd2Fe14B-type phase (space group P42/mnm) that is mainly present in the RQ alloys at 295 K. In the Nd12Fe82B6 alloy, this phase has a ferro-magnetic structure with magnetic moments at the Nd and Fe atoms oriented parallel to the c axis; the Er2Fe14B phase found in the Er12Fe82B6 alloy is characterized by a ferrimagnetic order of Er and Fe magnetic moments parallel to the basal plane. After irradiation, the crystalline state of both RQ alloys transforms into an amorphous state. The ferro- and ferrimagnetic orders are retained in them, but the Curie temperature of the alloys with Nd and Er decreases by 100 and 200 K, respectively. The spontaneous magnetization of the irradiated alloys at 5 K is approximately equal to their magnetization in the crystalline state, whereas their coercive force is lower than that for the alloys before irradiation by two orders of magnitude. The effects observed are explained by the dispersion of Fe-Fe exchange interactions resulting from the dispersion of interatomic spacings in the amorphous alloys.

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References

  1. E. Burzo, “Permanent Magnets Based on R-Fe-B and R-Fe-C Alloys,” Rep. Prog. Phys. 61, 1099–1266 (1998).

    Article  CAS  Google Scholar 

  2. K. H. J. Buschow, “New Developments in Hard Magnetic Materials,” Rep. Prog. Phys. 54, 1123–1213 (1991).

    Article  CAS  Google Scholar 

  3. S. D. Bader, “Colloquium: Opportunities in Nanomagnetism,” Rev. Mod. Phys. 78, 1–15 (2006).

    Article  CAS  Google Scholar 

  4. G. P. Meisner and V. Panchanathan, “Study of Desorbed Hydrogen Decrepitated Anisotropic Nd2Fe14B Powder Using X-ray Diffraction,” J. Appl. Phys. 76, 6259–6261 (1994).

    Article  CAS  Google Scholar 

  5. S. V. Andreev, N. V. Kudrevatykh, V. I. Pushkarsky, P. E. Markin, N. K. Zaikov, and E. N. Tarasov, “Magnetic Hysteresis Properties of Melt-Spun Nd-Fe-B Alloys Prepared by Centrifugal Method,” J. Magn. Magn. Mater. 187, 83–87 (1998).

    Article  CAS  Google Scholar 

  6. B. C. Gaviko, A. G. Popov, A. C. Ermolenko, K. N. Shchegoleva, V. V. Stolyarov, and D. V. Gunderov, “Decomposition of the Nd2Fe14B Intermetallic Compound upon Severe Plastic Deformation by Shear under Pressure,” Phys. Met. Metallogr. 92, 158–166 (2001).

    Google Scholar 

  7. A. G. Popov, B. C. Gaviko, N. K. Shchegoleva, L. A. Shreder, V. V. Stolyarov, D. V. Gunderov, Kh. Yu. Zhan, V. Li, and L. L. Li, “High-Pressure-Torsion Deformation of Melt-Spun Nd9Fe85B6 Alloy,” Phys. Met. Metallogr. 104, 238–247 (2007).

    Article  Google Scholar 

  8. A. Nino and Y. Umakoshi, “Electron Irradiation Induced Crystallization and Amorphization in Fe77Nd4.5B18.5 Metallic Glass,” Mater. Sci. Eng., A 449–451, 1115–1118 (2007).

    Google Scholar 

  9. J. C. Rodriguez, “Recent Advances in Magnetic Structure Determination by Neutron Powder Diffraction,” Physica B 192, 55–69 (1993).

    Article  Google Scholar 

  10. J. F. Herbst, J. J. Croat, and W. B. Yelon, “Structural and Magnetic Properties of Nd2Fe14B,” J. Appl. Phys. 57, 4086–4090 (1985).

    Article  CAS  Google Scholar 

  11. R. Dalmas, D. Fruchart, L. Pontonnier, F. Vaillant, P. Wolfers, A. Yaouanc, J. M. D. Coey, R. Fruchart, and P. H. Heritier, “Structural and Magnetic Properties of RE2Fe14BH(D)x,” J. Less. Comm. Met. 129, 133–144 (1987).

    Article  Google Scholar 

  12. P. Debye, R. Anderson, and H. Brumberger, “Scattering by an Inhomogeneous Solid. II. The Correlation Function and Its Application,” J. Appl. Phys. 28, 679–683 (1957).

    Article  CAS  Google Scholar 

  13. H. D. Bale, W. Paul, and P. W. Schmidt, “Small-Angle X-ray-Scattering Investigation of Submicroscopic Porosity with Fractal Properties,” Phys. Rev. Lett. 53, 596–599 (1984).

    Article  CAS  Google Scholar 

  14. J. S. Fang, M. F. Hsieh, S. K. Chen, and T. S. Chin, “Magnetic Properties and Structure of Nd(Fe,B) Nanocomposite Alloys with Fixed Fe/B Ratio at 4–14,” Jpn. J. Appl. Phys. 36, 6316–6324 (1997).

    Article  CAS  Google Scholar 

  15. D. I. Svergun and L. A. Feigin, Small-Angle X-ray and Neutron Scattering (Nauka, Moscow, 1986) [in Russian].

    Google Scholar 

  16. S. Chikasumi, Physics of Ferromagnetism. Magnetic Characteristics and Engineering Applications (Syokabo, Tokyo, 1984; Mir, Moscow, 1987).

    Google Scholar 

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Authors and Affiliations

  1. Institute of Metal Physics, Ural Branch, Russian Academy of Sciences, ul. S. Kovalevskoi 18, Ekaterinburg, 620990, Russia

    A. E. Teplykh, Yu. G. Chukalkin, S. G. Bogdanov, Yu. N. Skryabin & A. N. Pirogov

  2. Division of Solid State Magnetism, Research Institute of Physics and Applied Mathematics, Ural Federal University, pr. Lenina 51, Ekaterinburg, 620083, Russia

    N. V. Kudrevatykh, S. V. Andreev, A. S. Volegov & A. I. Kozlov

  3. Department of Materials Science and Egineering, Dankook University, Chonan, Korea

    Y. Choi

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  1. A. E. Teplykh
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  2. Yu. G. Chukalkin
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  3. S. G. Bogdanov
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  4. Yu. N. Skryabin
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  5. N. V. Kudrevatykh
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  6. S. V. Andreev
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  7. A. S. Volegov
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  8. A. I. Kozlov
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Additional information

Original Russian Text © A.E. Teplykh, Yu.G. Chukalkin, S.G. Bogdanov, Yu.N. Skryabin, N.V. Kudrevatykh, S.V. Andreev, A.S. Volegov, A.I. Kozlov, Y. Choi, A.N. Pirogov, 2012, published in Fizika Metallov i Metallovedenie, 2012, Vol. 113, No. 6, pp. 597–606.

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Teplykh, A.E., Chukalkin, Y.G., Bogdanov, S.G. et al. Irradiation-induced amorphized state of rapidly quenched R 12Fe82B6 alloys (R = Nd, Er). Phys. Metals Metallogr. 113, 566–574 (2012). https://doi.org/10.1134/S0031918X12060105

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  • DOI: https://doi.org/10.1134/S0031918X12060105

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