Static and resonant properties of decorated square kagomé lattice KCu7(TeO4)(SO4)5Cl

Markina, M.M.; Berdonosov, P.S.; Vasilchikova, T.M.; Zakharov, K.V.; Murtazoev, A.F.; Dolgikh, V.A.; Moskin, A.V.; Glazkov, V.N.; Smirnov, A.I.; Vasiliev, A.N.

Авторы: Markina M.M., Berdonosov P.S., Vasilchikova T.M., Zakharov K.V., Murtazoev A.F., Dolgikh V.A., Moskin A.V., Glazkov V.N., Smirnov A.I., Vasiliev A.N.
Журнал: Materials Chemistry and Physics
Номер: 129348
Год издания: 2024
Издательство: Elsevier BV
Местоположение издательства: Netherlands
DOI: 10.1016/j.matchemphys.2024.129348
Аннотация: The magnetic subsystem of nabokoite, KCu7(TeO4)(SO4)5Cl, is constituted by copper ions forming a buckled square kagomé lattice decorated by quasi-isolated ions. This combination determines peculiar physical properties of this compound evidenced in electron spin resonance (ESR) spectroscopy, dielectric permittivity ɛ, magnetization M and specific heat Cp measurements. At lowering temperature, the magnetic susceptibility χ=M/H passes through a broad hump inherent for low-dimensional magnetic systems at about 150 K and a sharp peak at antiferromagnetic phase transition at TN=3.2 K. The Cp(T,H) curves demonstrate additional peak-like anomaly at Tpeak=5.7 K robust to magnetic field. The latter can be ascribed to low-lying singlet excitations filling the singlet-triplet gap in magnetic excitation spectrum of the square kagomé lattice (Richter et al., 2022). ESR spectroscopy provides indications that antiferromagnetic structure below TN is non-collinear. Separate issue is the observation of antiferroelectric-type behavior in ɛ at low temperatures, which tentatively reduces the symmetry and partially lifts frustration of magnetic interactions of decorating copper ions with buckled square kagomé lattice. These complex thermodynamic and resonant properties signal the presence of two weakly coupled magnetic subsystems in nabokoite, namely a spin-liquid in square kagomé lattice layers and an antiferromagnet represented by decorating ions.
Добавил в систему: Бердоносов Петр Сергеевич

	ИСТИНА	Войти в систему Регистрация
	Интеллектуальная Система Тематического Исследования НАукометрических данных
	Главная Поиск Статистика О проекте Помощь

ИСТИНА

Интеллектуальная Система Тематического Исследования НАукометрических данных

Static and resonant properties of decorated square kagomé lattice KCu7(TeO4)(SO4)5Clстатья

Прикрепленные файлы