Please use this identifier to cite or link to this item: http://nopr.niscair.res.in/handle/123456789/25130
Title: Magnetic behaviour of (Fe0.90 Mnx Co0.1-x)2 P
Authors: Jain, S K
Chander, Subhash
Dolia, S N
Krishnamurthy, Anjali
Srivastava, Bipin K
Keywords: Disordered magnetic systems;Ferromagnetic alloys;Magnetic properties
Issue Date: Jun-2003
Publisher: NISCAIR-CSIR, India
Abstract:  Fe0.90 Mnx Co0.1-x)2P with x=0.03 , 0.05 and 0.07 (hereafter referred to as FMC37, FMC55 and FMC73, respectively) crystallize in Fe2P like hexagonal symmetry. DC magnetization measurements have been made on these alloy systems in external fields up to 8.5 kOe and in the temperature range 85-400K. The alloys are ferromagnetic with Tc~325K for FMC37, ~250K for FMC55 and ~220K for FMC73. While FMC37 shows a clear paramagnetic to ferromagnetic transition, in FMC55 and FMC73, the transition anomaly is field-dependent and gets suppressed by rather low fields. In these two systems, FM order keeps evolving with cooling below these Curie points and at still lower temperatures negative exchange gains in strength, giving rise to disordered magnetic state, which shows long time magnetic relaxation. Below 85 K, there could be another modification in magnetic states of the two systems with positive exchange interaction regaining in strength.
Page(s): 488-490
URI: http://hdl.handle.net/123456789/25130
ISSN: 0975-1041 (Online); 0019-5596 (Print)
Appears in Collections:IJPAP Vol.41(06) [June 2003]

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