Magnetization process of the S = 1/2 Heisenberg antiferromagnet on the floret pentagonal lattice

Multilayer S 5 12 Heisenberg antiferromagnet

The multilayer S5 1 2 square lattice Heisenberg antiferromagnet with up to six layers is studied using various series expansions. For systems with an odd number of coupled planes, the ground-state energy, staggered magnetization, and triplet excitation spectra are calculated using two different Ising expansions. The systems are found to have long-range Néel order and gapless excitations for all...

Heisenberg Antiferromagnet on a Triangular Lattice

The Heisenberg antiferromagnet on the square-kagomé lattice

We discuss the ground state, the low-lying excitations as well as high-field thermodynamics of the Heisenberg antiferromagnet on the two-dimensional square-kagomé lattice. This magnetic system belongs to the class of highly frustrated spin systems with an infinite non-trivial degeneracy of the classical ground state as it is also known for the Heisenberg antiferromagnet on the kagomé and on the...

Symmetry considerations on the magnetization process of the Heisenberg model on the pyrochlore lattice

Abstract. We present a detailed symmetry analysis of the degeneracy lifting due to higher order spin exchanges in the pyrochlore lattice in applied magnetic field. Under the assumption of the 4 sublattice ordering, the criteria for a stable half-magnetization plateau are deduced. The higher order exchange terms may originate from spin–lattice coupling, or can describe quantum and thermal fluctu...

the effect of keeping reflective journals by language instructors on the process of reading comprehension among iranian high school students

خواندن ودرک مطلب از مهمترین مهارتها در یادگیری زبان خارجی محسوب می شود. این تحقیق تاثیر برگه های تامل برانگیز هدایت شده را در ارتقاع مهارت خواندن ودر ک مطلب در دانش اموزان دبیرستانی ایرانی بررسی می نماید. ازمجموع ?2 دانش آموز سال چهارم دبیرستان شهید رجایی شهرستان اسلامشهر¸ پس از اجرای آزمون استاندارد ((nelson 150a تعداد 39 دانش آموز که نمرات آنها یک سطح انحراف معیار بالاتر یا پایین تر ازمعدل قر...