Hadayat Ullah Khan et al 2007 J. Phys.: Condens. Matter 19 106202 doi:10.1088/0953-8984/19/10/106202
Hadayat Ullah Khan1, Kaneez Rabia, Arif Mumtaz and Syed Khursheed Hasanain
Show affiliationsLinear and non-linear dynamic properties of a re-entrant ferromagnetic polycrystalline bulk La0.85Ca0.15Mn0.95Fe0.05O3 sample are studied using AC susceptibility. This sample composition shows a transition from paramagnetic (PM) to ferromagnetic (FM) at around 174 K and to spin glass (SG) at ~100 K. The dynamic behaviour is investigated in the intermediate temperature range (Tg<T<Tc). A prominent non-linear susceptibility is observed in this range, signifying the decomposition of the FM network into clusters by a random magnetic field which is expected to be generated by PM spins in the FM region. The results are supported by a study of the AC frequency and DC field effect on the non-linear susceptibility.
75.30.Cr Saturation moments and magnetic susceptibilities
75.60.Ej Magnetization curves, hysteresis, Barkhausen and related effects
75.30.Kz Magnetic phase boundaries (including magnetic transitions, metamagnetism, etc.)
Issue 10 (14 March 2007)
Received 9 September 2006, in final form 8 January 2007
Published 15 February 2007
Hadayat Ullah Khan et al 2007 J. Phys.: Condens. Matter 19 106202
E Askari et al 2008 J. Phys.: Conf. Ser. 125 012078
S Watanabe et al 2009 J. Phys.: Conf. Ser. 190 012021
Claudine Noguera and Jacek Goniakowski 2008 J. Phys.: Condens. Matter 20 264003
M Rakhmanov et al 2008 Class. Quantum Grav. 25 184017
Roberto Rozas and Thomas Kraska 2007 Nanotechnology 18 165706
Robert Grone et al 2008 J. Phys. A: Math. Theor. 41 212002
Juan A Bonachela et al 2008 J. Phys. A: Math. Theor. 41 202001
Jan H Meinke and Ulrich H E Hansmann 2007 J. Phys.: Condens. Matter 19 285215
Iwan Jensen and Andrew Rechnitzer 2008 J. Phys. A: Math. Theor. 41 215002