In this research, we studied the magnetic phase transition by Mössbauer spectroscopy and using vibrating sample magnetometer for amorphous Fe86-xZr7CrxNb2Cu1B4 (x = 0 or 6) alloys in the as-quenched state and after accumulative annealing in the temperature range 600-750 K. The Mössbauer investigations were carried out at room and nitrogen temperatures. The Mössbauer spectra of the investigated alloys at room temperature are characteristic of amorphous paramagnets and have a form of asymmetric doublets. However, at nitrogen temperature, the alloys behave like ferromagnetic amorphous materials. The two components are distinguished in the spectrum recorded at both room and nitrogen temperatures. The low field component in the distribution of hyperfine field induction shifts towards higher field with the annealing temperature. It is assumed that during annealing at higher temperature, due to diffusion processes, the grains of α-Fe are created in the area corresponding to this component. Both investigated alloys show the invar effect and the decrease of hyperfine field induction after annealing at 600 K for 10 min is observed. It is accompanied by the lowering of Curie temperature.
If the inline PDF is not rendering correctly, you can download the PDF file here.
1. Lorenz R. & Hafner J. (1995). Non-collinear magnetic structures in amorphous iron and iron-based alloys. J. Magn. Magn. Mater. 139 209-227. DOI: 10.1016/0304-8853(95)90049-7.
2. Rzącki J. Świerczek J. Hasiak M. Olszewski J. Zbroszczyk J. & Ciurzyńska W. (2015). Hyperfine interaction and some thermomagnetic properties of amorphous and partially crystallized Fe70-xMxMo5Cr4Nb6B15 (M=Co or Ni x=0 or 10). Nukleonika 60(1) 121-126. DOI: 10.1515/nuka-2015-0025.
3. Ren H. & Ryan D. H. (1995). Exchange frustration and transverse spin freezing in iron-rich metallic glasses. Phys. Rev. B 51 15885-15897.
4. McHenry M. E. Willard M. A. & Laughlin D. E. (1999). Amorphous and nanocrystalline materials for applications as soft magnets. Prog. Mat. Sci. 44 291-433. DOI: 10.1016/S0079-6425(99)00002-X.
5. Herzer G. (2013). Modern soft magnets: Amorphous and nanocrystalline materials. Acta Mater. 61 718-734. DOI: 10.1016/j.actamat.2012.10.040.
6. Greneche J. M. (1997). Nanocrystalline ironbased alloys investigated by Mössbauer spec- trometry. Hyperfi ne Interact. 110 81-91. DOI: 10.1023/A:1012671315478.
7. Miglierini M. & Greneche J. M. (1997). Mössbauer spectrometry of Fe(Cu)MB-type nanocrystalline alloys: I. The fi tting model for the Mössbauer spectra. J. Phys.-Condens. Matter 9 2303-2319. DOI: 10.1088/0953-8984/9/10/017.
8. Hesse J. & Rübartsch A. (1974). Model independent evaluation of overlapped Mössbauer spectra. J. Phys. E.-Sci. Inst. 7 526-532.
9. Brand R. A. (1987). Improving the validity of hyperfi ne fi eld distributions from magnetic alloys. Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms 28 398-416.
10. Kopcewicz M. Grabias A. Nowicki P. & Williamson D. L. (1996). Mössbauer and X-ray study of the structure and magnetic properties of amorphous and nanocrystalline Fe81Zr7B12 and Fe79Zr7B12Cu2 alloys. J. Appl. Phys. 79 993-1003. DOI: 10.1063/1.360885.
11. Gondro J. Świerczek J. Rzącki J. Ciurzyńska W. Olszewski J. Zbroszczyk J. Błoch K. Osyra M. & Łukiewska A. (2013) Invar behaviour of NANOPERM-type amorphous Fe-(Pt)-Zr-Nb-Cu-B alloys. J. Magn. Magn. Mater. 341 100-107. DOI: 10.1016/j.jmmm.2013.04.009.
12. Błachowski A. & Wdowik U. D. (2012). Transition metal impurity effect on charge and spin density in iron: Ab initio calculations and comparison with Mössbauer data. J. Phys. Chem. Solids 73 317-323. DOI: 10.1016/j.jpcs.2011.10.017.10.1016/j.jpcs.2011.10.017.