Magnetic Enhancement in Cobalt-Manganese Alloy Clusters
نویسندگان
چکیده
منابع مشابه
Magnetic enhancement in cobalt-manganese alloy clusters.
Magnetic moments of Co(N)Mn(M) and Co(N)V(M) clusters (N < or = 60; M < or = N/3) are measured in molecular beams using the Stern-Gerlach deflection method. Surprisingly, the per atom average moments of Co(N)Mn(M) clusters are found to increase with Mn concentration, in contrast to bulk CoMn. The enhancement with Mn doping is found to be independent of cluster size and composition in the size r...
متن کاملMagnetic phases of cobalt atomic clusters on tungsten.
First-principle calculations are employed to show that the magnetic structure of small atomic clusters of Co, formed on a crystalline W(110) surface and containing 3-12 atoms, strongly deviates from the usual stable ferromagnetism of Co in other systems. The clusters are ferri-, ferro- or non-magnetic, depending on cluster size and geometry. We determine the atomic Co moments and their relative...
متن کاملMagnetic moments and adiabatic magnetization of free cobalt clusters.
Magnetizations and magnetic moments of free cobalt clusters Co(N) (12 < N < 200) in a cryogenic (25 K < or = T < or = 100 K) molecular beam were determined from Stern-Gerlach deflections. All clusters preferentially deflect in the direction of the increasing field and the average magnetization resembles the Langevin function for all cluster sizes even at low temperatures. We demonstrate in the ...
متن کاملUnderstanding the elusive magnetic behavior of manganese clusters
José Mejía-López,1 Aldo H. Romero,2 Martin E. Garcia,3 and J. L. Morán-López4,* 1Facultad de Física, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile 2CINVESTAV Querétaro, Libramiento Norponiente No. 2000, 76230 Querétaro, Mexico 3Theoretische Physik, Fachbereich Naturwissenschaften, and Center for Interdisciplinary Nanostructure Science and Technology (CINSaT), Univers...
متن کاملGiant-magnetic clusters and susceptibility enhancement in Pd-Ni alloys.
A recently developed formalism is used to calculate the saturation magnetization and temperaturedependent, exchange-enhanced Pauli susceptibility of paramagnetic and weakly ferromagnetic Pd-Ni alloys. The eff'ects of quantum and thermal spin fluctuations are included in alloy calculations for the first time, through the use of a semiphenomenological theory consistent with the results of renorma...
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: Physical Review Letters
سال: 2007
ISSN: 0031-9007,1079-7114
DOI: 10.1103/physrevlett.98.113401