Magneto mechanics coupling

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Hi, I'm a new COMSOL user and I'm trying to model the deformation of a magnetized polymer due to an external magnetic field. The problem that I'm facing right now is that in the structural mechanics - magnetic fields, no currents coupling there aren't any domains where the coupling is applicable. My model is quite simple, it just consists of two rectangles (2D), where the outer one is the air domain and the inner one is the polymer, but I can't get why the coupling is not applicable to the polymer. To me it seems that the coupling is not possible because the polymer is magnetized (using "Magnetic Flux Conservation" node). I attach a screenshot of my model builder if it can be of any help.

Thank you in advance if you can help me!



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