A first-order magnetic phase transition near 15 K with novel magnetic-field-induced effects in Er₅Si₃

Abstract

We present magnetic characterization of a binary rare-earth intermetallic compound Er(5)Si(3), crystallizing in Mn(5)Si(3)-type hexagonal structure, through magnetization, heat capacity, electrical resistivity and magnetoresistance measurements. Our investigations confirm that the compound exhibits two magnetic transitions with decreasing temperature, the first one at 35 K and the second one at 15 K. The present results reveal that the second magnetic transition is a disorder-broadened first-order transition, as shown by thermal hysteresis in the measured data. Another important finding is that, below 15 K, there is a magnetic-field-induced transition with a hysteretic effect with the electrical resistance getting unusually enhanced at this transition and the magnetoresistance is found to exhibit intriguing magnetic-field dependence, indicating novel magnetic phase coexistence phenomenon. It thus appears that this compound is characterized by interesting magnetic anomalies in the temperature-magnetic-field phase diagram.

Structure, magnetism and magnetocaloric effects in Er5Si3B x (x = 0.3,0.6) compounds

“…The variation of the lattice constant will cause a dramatic change of the orbital exchange between the elements in the system, which will exhibit complex and fascinating magnetic properties. [36] In order to understand the magnetic and magnetic phase transitions, the temperature-dependent magnetization curves M(T ) for Er 5 Si 3 B x compounds were obtained by using field cooling (FC) and zero-field cooling (ZFC) modes, and the corresponding results are shown in Figs. 2(a) and 2(b).…”

Структура электронных состояний соединений Gd-=SUB=-5-=/SUB=-Sb-=SUB=-3-=/SUB=- и Gd-=SUB=-5-=/SUB=-Ge-=SUB=-2-=/SUB=-Sb по данным зонных расчетов и оптической спектроскопии

“…Бинарные интерметаллические соединения R 5 M 3 (где R -редкоземельный металл, M−p-элемент) кристаллизуются в гексагональной структуре Mn 5 Si 3 -типа, в которой элементарная ячейка состоит их пяти слоев атомов в направлении оси c. К настоящему времени синтезировано и изучено большое количество таких материалов. Соединения указанной серии характеризуются большим разнообразием магнитных свойств, в частности, наличием различных магнитных фаз, метамагнитных переходов, состояния спинового стекла, больших магниторезистивных и магнетокалорических эффектов [1][2][3][4][5][6][7][8][9][10][11][12][13]. В данной кристаллической структуре ионы редкоземельного металла локализованы в двух неэквивалентных кристаллографических позициях, формирующих различные R-подрешетки [14].…”

Competing magnetic interactions and magnetocaloric effect in Ho5Sn3

“…Among the binary and pseudo-binary heavy RE compounds and alloys, Gd 5 Ge 4 based compositions with 5:4 stoichiometry are the most widely studied materials due to their exotic ground state, metastability, phase coexistence, magneto-structural instability and above all giant MCE [20]. In contrast, the RE 5 X 3 (X is a non-magnetic element) compositions are much less studied [21][22][23][24][25][26][27][28][29][30][31][32]. This paper focuses on the magnetic and magnetocaloric properties of a Ho-based REI compound Ho 5 Sn 3 .…”