31. When a sample is cooled below the Curie temperature , for example, the equilibrium domain configuration simply appears. 32. The dashed lines shows the behaviour of a regular ferroelectric material with a ferroelectric instability at the Curie temperature . 33. Below the Curie temperature , the atoms are aligned and parallel, causing spontaneous magnetism; the material is ferromagnetic. 34. Composite materials, that is, materials composed from other materials with different properties, can change the Curie temperature . 35. The maximum operating temperature is limited by the Curie temperature of the used piezoelectric ceramic and may exceed + 250C. 36. Ferrite above the critical temperature A 2 ( Curie temperature ) of, where it is paramagnetic rather than ferromagnetic. 37. This is similar to the Curie temperature as above the N�el Temperature the material undergoes a phase transition and becomes paramagnetic. 38. Neodymium magnets have higher remanence, much higher coercivity and energy product, but often lower Curie temperature than other types. 39. The transition from antiferromagnetic to paramagnetic ( or vice versa ) occurs at the N�el temperature which is analogous to Curie temperature . 40. As the crystal is cooled below the Curie temperature , it shifts gradually into a more and more non-centrosymmetric configuration.
