Tunable magnetic ordering through cation selection in entropic spinel oxides

Magnetic properties of high entropy oxides

“…This encapsulation of different magnetic and spin electronic states in a single crystallographic structure of P-HEOs certainly motivates further investigation. 21 Several other S-HEO compositions are now known, as shown in Table 1. 21,40 The compositional variation and the resulting impact on the site occupations result in drastic changes in the magnetic properties.…”

“…21 Several other S-HEO compositions are now known, as shown in Table 1. 21,40 The compositional variation and the resulting impact on the site occupations result in drastic changes in the magnetic properties. Most of the Cr-rich system, where Cr is expected to solely occupy the B-site, showed predominant AFM ordering at low temperatures.…”

“…The growing interest in the field of HEOs is illustrated by the numerous studies focusing on their different structural and functional aspects that have already been reported within the five years since their discovery. Currently, there are eight major classes of HEOs that can be categorized based on the crystallographic structures: rocksalt, 1,3,8,9 fluorite, [10][11][12][13][14][15] bixbyite, 10,12,16 perovskite (cubic, orthorhombic, rhombohedral), 5,[17][18][19] spinel, 20,21 pyrochlore, 7,[22][23][24] layered (Ruddlesden-Popper and delafossite) [25][26][27] and magnetoplumbite. 28,29 Likewise, a broad range of properties, such as electrochemical, 2,[30][31][32] optical, 11,[33][34][35] magnetic, 21,29,34,[36][37][38][39][40][41][42]…”

Solid‐state synthesis of multicomponent equiatomic rare‐earth oxides

“…Recently the high-entropy concept has been extended to metal diborides 17 carbides 18 nitrides, 19 and oxides. 20 The field of high-entropy oxides attracts attention as a current research topic, [21][22][23][24][25][26] particularly due to the functional properties that have been reported, such as high dielectric constant, 27 lithium superionic conductivity, 28 magnetic properties, [29][30][31] electrical and thermal conductivities, 32,33 reversible energy storage, 34 and high catalytic activity in CO oxidation. 35 Launching the field of high-entropy oxides, Rost 20 reported a single rocksalt structure for (Mg ,Ni, Co, Cu, Zn)O pellets produced using solid-state synthesis.…”

“…Recently the high‐entropy concept has been extended to metal diborides carbides nitrides, and oxides . The field of high‐entropy oxides attracts attention as a current research topic, particularly due to the functional properties that have been reported, such as high dielectric constant, lithium superionic conductivity, magnetic properties, electrical and thermal conductivities, reversible energy storage, and high catalytic activity in CO oxidation …”