ISSN:
1089-7550
Source:
AIP Digital Archive
Topics:
Physics
Notes:
(Fe0.90Cr0.03Ni0.07)2P and (Fe0.90Cr0.05Ni0.05)2P are found to crystallize in Fe2P-like hexagonal symmetry (hereafter referred to as FCN37 and FCN55, respectively). dc magnetization measurements have been made in external fields upto 8 kOe and in the temperature range 80–800 K. ac susceptibility measurements have been performed in the temperature range 80–300 K. dc measurements show that the two alloys are ferromagnetic with Tc∼250 K for FCN37 and ∼180 K for FCN55. Magnetic moments of the polycrystalline samples at 7 kOe and ∼90 K are 67 and 47 emu/g for FCN37 and FCN55, respectively. Both of them also exhibit small but finite remanence and coercivity. The temperature dependent magnetization measurements made on FCN37 and FCN55 in zero field cooling and field cooling modes branch off at ∼230 and ∼125 K, respectively. Remanent magnetization, measured in the remanent field of the magnet (∼20 Oe), preceded by isothermal cooling of the samples down to 85 K and applications of different fields for fixed interval, relaxes over a period of time following log t. Peak in the ac susceptibility-temperature curve, measured at three frequencies in the interval 27–983 Hz, shifts with frequency obeying Vogel–Fulcher law. Results suggest existence of magnetic clusters in the two ferromagnetically ordered alloys, or spin glass state at low temperatures, or both.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.353596
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