This metamagnetic like transition is a characteristics of antiferromagntic like ordering present in the system..But what actually does it mean..what happens to the magnetic states..please explain..
Dear Srikanta,
Metamagnetism is defined as the transition from an antiferromagnetic to a ferromagnetic spin configuration reached by a change of temperature or by applying an external magnetic field. The metamagnetism is characterized by discontinous jumps of the magnetization where the spin flopping is obtained for certain crital value of the external magnetic field.
Metamagnetism is a very general term. It refers to a transition from a state of low magnetization to a state of high magnetization. A classical example is the antiferromagnet FeCl2. At low temperature (T
Dear Srikanta,
In section 19.1 of the
Soshin Chikazumi, Physics of Ferromagnetism, Oxford University Press, 2nd edition 1997
you have explained in more detail what is understood for this spin phase transition.
Thank you Sir, Daniel Baldomir and Sir, Christian Binek for your fruitful explanations and suggestions..It helped a lot ..
In an early study of antiferromagnetism, Neel predicted the magnetic field conditions under which an antiferromagnet would show an abrupt decoupling between the direction of antiferromagnetism and the easy axis, known as spin-flopping or magnetization turn over. He later extended this analysis to behaviour termed metamagnetic transition in which an antiferromagnetic array abruptly transforms to a fully aligned ferromagnetic array at a critical field. The idea received further impetus by Wholfarth and Rhodes who, on the basis of a collective electron model, predicted that certain paramagnetic substances could become ferromagnetic, if subject to strong fields. The condition for such a transition was attributed to high paramagnetic susceptibility and a maximum of the susceptibility as a function of temperature.
For further references, see Gouri S. Tripathi, Phys, Rev. B 52, 6522 (1995).
Thank you Sir, Gouri Sankar Tripathy for your explanation..I will definitely go through the article..
Metamagnetic transitions are the states of a system those are far apart from the global equilibrium state of that system. Basically, under this situation system prefers to stay at local minima instead of global minima. One of the familiar example of this transition is the field induced magnetization steps in isothermal M-H curve. Here, depending on the universality class of the AFM state the involved dynamics is called either flip or flop transition.
A quite recent paper on this issue and where the concept of this magnetic transition is very well applied is in:
Metamagnetism and the fifth-order susceptibility in UPt3
B. S. Shivaram, Brian Dorsey, D. G. Hinks, and Pradeep Kumar
Phys. Rev. B 89, 161108(R) (2014) - Published 14 April 2014
Ok Sir, Daniel Baldomir..I will go through the paper..and Thank you Santanu for the explanation..
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