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  • Title: Structural and magnetic dynamics of a laser induced phase transition in FeRh.
    Author: Mariager SO, Pressacco F, Ingold G, Caviezel A, Möhr-Vorobeva E, Beaud P, Johnson SL, Milne CJ, Mancini E, Moyerman S, Fullerton EE, Feidenhans'l R, Back CH, Quitmann C.
    Journal: Phys Rev Lett; 2012 Feb 24; 108(8):087201. PubMed ID: 22463562.
    Abstract:
    We use time-resolved x-ray diffraction and magneto-optical Kerr effect to study the laser-induced antiferromagnetic to ferromagnetic phase transition in FeRh. The structural response is given by the nucleation of independent ferromagnetic domains (τ(1)~30 ps). This is significantly faster than the magnetic response (τ(2)~60 ps) given by the subsequent domain realignment. X-ray diffraction shows that the two phases coexist on short time scales and that the phase transition is limited by the speed of sound. A nucleation model describing both the structural and magnetic dynamics is presented.
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