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Explain experimental evidence to demonstrate the existence of ferromagnetic domains.
Temperature increases, thermal motion, or entropy, competes with ferromagnetic tendency for dipoles to align. When temperature rises beyond a certain point, known as Curie temperature, there is a second-order phase transition and system can no longer maintain a spontaneous magnetization, though it still responds paramagnetically to an external field. Below that temperature, there is a spontaneous symmetry breaking and random domains form (in absence of an external field). Curie temperature itself is a critical point, where magnetic susceptibility is theoretically infinite and, though there is no net magnetization, domain-like spin correlations fluctuate at all length scales.
Physical properties of tri hydric alcohol
Reduction of Alkyne: Alkynes add on hydrogen in existence of appropriate catalysts like finely divided Ni, Pd. Determine if the triple bond is not found at the end of t
how to calculate equivalent weight of given substance? like K2C2O2.H2O
Q. Explain Combined Gas Law? Ans. The combined gas law combines Boyle's law and Charles' law. The combined gas law describes situations where a gas undergoes simul
explain about p block element
The radius of electron in the first excited state of hydrogen atom is: (1) a 0 (2) 4a 0 (3) 2a 0 (4) 8a o
Q. Consider a system containing only NH 4 Cl(s), NH 3 (g), and HCl(g). Assume that the equilibrium NH 4 Cl(s) ⇔ NH 3 (g), and HCl(g) exists. (a) Suppose you prepare the system b
4-methyl 2- hexyne
Branched chain polymers - Classification of polymers These are polymers where the monomers are connected to make long chains with side chains or branches of dissimilar sizes.
Molisch's Test - Test on Glucose This is a common test for carbohydrates. Three or Two drops of alcoholic solvent of α-naphthol are involved to 2mL of glucose solution. 1 mL of
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