Mode coupling theory for the critical dynamics of dipolar ferromagnets
نویسندگان
چکیده
منابع مشابه
Coupling Theory for the Critical Dynamics of Dipolar Ferromagnets
Above T c the critical dynamics of isotropic ferromagnets has been studied by various experimental methods, sampling different regions in wave vector space. These measurements indicate that the critical dynamics of isotropic ferromagnets cannot be explained solely on the basis of the short range exchange interaction. In hyperfine interaction (HFI) experiments on Ni and Fe a crossover in the dyn...
متن کاملCritical Dynamics of Dipolar Ferromagnets
The dynamics of isotropic ferromagnets as EuO, EuS and Fe has been in focusever since the very beginnings ofthe field of critical dynamics. Despite the largeamount of experimental [1—6]and theoretical investigations [7,8], there remain importantopen problemswhich havenot been resolved up to now. (i) The expected crossover from isotropic to dipolar critical behaviour, accompanied by a change of ...
متن کاملCritical Dynamics of Ferromagnets
The crossover in the dynamics from isotropic to dipolar critical behaviour has been a matter of debate over many years. We review a mode coupling theory for dipolar ferromagnets which gives a unified explanation of the seemingly contradictory experimental situation. The shape functions, the scaling functions for the damping coefficients and the precise position of the crossover are computed. Be...
متن کاملRenormalized Field Theory for the Static Crossover in Dipolar Ferromagnets
A field theoretical description for the static crossover in dipolar ferromagnets is presented. New non leading critical exponents for the longitudinal static susceptibility are identified and the existence and magnitude of the dip in the effective critical exponent of the transverse susceptibility found by matching techniques is scrutinized. It was first shown by Aharony and Fisher [l] that the...
متن کاملThe essentials of the mode-coupling theory for glassy dynamics
The essential results of the mode-coupling theory for the evolution of structural relaxation in simple liquids such as the Debye-Waller-factor anomaly, the critical decay, von Schweidler’s law, the α and β -relaxation scaling, the appearance of two divergent time scales, and Kohlrausch’s law for the α -process are explained, and their relevance to the understanding of experiments in glass-formi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Hyperfine Interactions
سال: 1989
ISSN: 0304-3834,1572-9540
DOI: 10.1007/bf02407720