Dear Vasudha, in my quotation of Gor'kov and Kresin one finds (please see above):

"The percolation can be interpreted as a more subtle case of phase separation where “phases” coexist on a mesoscopic scale or even as interweaving clusters."

In other words, phase separation is appropriately acknowledged by the authors (please consult the original review, which is a very readable one). With reference to my first response on this page, when one has phase separation, Maxwell construction is applicable. And this is what you are also referring to, albeit in different terms.

The Verway transition in Manganite, Fe3O4, is a first-order phase transition and therefore one has to do with coexisting states whose volume fractions can be calculated my means of the Maxwell construction.

Behnam, I think the question was about Mn oxides rather than magnetite.

But Vasudha, what kind oft phases is your question ab out? Different compositions? What is the context oft your query?

Kai Sir my question is about Mn oxide or manganite like LaCaMnO3, PrCaMnO3. These manganites have very rich phase diagram.

Dear Vasudha, Behnam has now proposed topics hat relate to some kind of phases and to phase separation. Dos this match your query? You have not been explicit with respect to what interests you when referring to 'rich phase diagrams'. Hat could still mean quite different things. What do you find on the parameter axes of the phase diagrams you're interested in?

Kai Sir, Behnam sir's answer does not match with my question. he is talking about percolation which is different from phase separation. As much i know when we change temperature, manganite shows phase separation means complete change of one phase to another and multiple phases can coexist in manganites on a single composition. And phase separation occurs when two phases of same kinetic energy coexist.

The meaning of rich phase diagram (composition vs. temperature diagram) was coexistence of multiple phase on a single composition.

Den Vasudha, let me first say that in my view Behnam's answer DOES match your question, because your question is so broad and unspecific. Percolation is only possible when a minimum of two phases are present.

Even now, you are still not saying what are the characteristics of the phases that you want to discuss about. lt is very difficult to enter a constructive dialogue with you. It would be good if you gave a specific example which shows the point you are trying to make. And in the cases you are thinking about, how would you determine that multiple phases of identical composition are present?

Dear Vasudha, in my quotation of Gor'kov and Kresin one finds (please see above):

"The percolation can be interpreted as a more subtle case of phase separation where “phases” coexist on a mesoscopic scale or even as interweaving clusters."

In other words, phase separation is appropriately acknowledged by the authors (please consult the original review, which is a very readable one). With reference to my first response on this page, when one has phase separation, Maxwell construction is applicable. And this is what you are also referring to, albeit in different terms.

In manganites we can find magnetic phase separation, electronic phase separation and structural phase separation. The term “phase separation” means the coexistence of domains, connected or not, of two different phases at the same time in the same material. These domains must be “sufficiently” large. We mustn’t confuse with the term “segregation” (less common in manganites), which add to this definition that the diffraction patterns and the microscopic images must be unique.