11 research outputs found
Non-equilibrium behavior of the magnetization in the helimagnetic phases of the rare earth alloys R_{1-x}Y_{x} (R = Gd, Tb, Dy)
We have performed DC and AC magnetization measurements for the rare-earth
magnetic alloy systems Gd_{0.62}Y_{0.38}, Tb_{0.86}Y_{0.14}, and
Dy_{0.97}Y_{0.03}. These materials commonly exhibit a proper helical magnetic
structure, and ferromagnetic structure at lower temperatures.In all of these
materials, a difference between zero-field-cooled (ZFC) magnetization and
field-cooled (FC) magnetization and a hysteresis loop in the M-H curve have
been observed in the helimagnetic phases. The non-equilibrium behavior is
possibly caused by a common nature, e. g., chiral domain structures. In
addition to the above behavior, strong non-linearity of the magnetization and
slow spin dynamics have been observed around the N'eel temperature only in
GdY. The spin-glass like behavior observed in
Gd_{0.62}Y_{0.38} could be related to a novel glassy state such as a
helical-glass state.Comment: 7pages 4 figures, 20th International Conference on Magnetism
(ICM2015
A generalization class of certain subclasses of -valenty analytic functions with negative coefficients
On a generalization of Avhadiev and Aksentev's theorem (Applications of convolutions in geometric function theory)
ON STARLIKENESS AND CONVEXITY OF CERTAIN MULTIVALENT FUNCTIONS(Topics in Univalent Functions and Its Applications)
Notes on certain class of analytic functions with negative coefficients
The object of the present paper is to show the extreme points of the class
A(n,Bk) consisting of analytic functions with negative coefficients and the support
points of the subclass A *(n,Bk) of A(n,Bk)