Sign reversal of magnetization and tunable exchange bias field in NdCr1−xFexO3 (x=0.05–0.2)

Reversal magnetization, spin reorientation, and exchange bias in YCrO3 doped with praseodymium

“…10 b). We can see [54]. The low magnetization values imply that the ferromagnetic signal from the Cr sublattice is weak below T * increasing slightly with Pr +3 content.…”

“…Three plausible answers could explain the magnetic behavior at low temperature: (i) the magnetic moments of the Pr ions (f 2 , S=1) is frozen, at the crystallographic 4c site, inducing spinglass clusters at about 10 K (ii) the octahedral distortion promotes the formation of ferromagnetic domains around Pr sites. (iii) exchange interaction between DM and the single ion magnetic anisotropy of the Pr ion [54,59]. The DM interaction is responsible for WFM domains and the single ion magnetic anisotropy arising from the random magnetic moment of the Pr ion (4f 2 -S=1) could be responsible of the ferromagnetic domains.…”

Unveiling ferrimagnetic ground state, anomalous behavior of the exchange-bias field around spin reorientation, and magnetoelectric coupling in YbCr1−xFexDalal1, Sarkar2, Rayaprol3 et al. 2020Phys. Rev. B18140View full textAdd to dashboardCite

“…Thus, the complex dielectric behavior along with the temperature induced MR phenomenon in both ZFC and FC mode, and ZFC exchange bias effect [27] makes using this particular material (YbCrO 3 ) fascinating to carry out the fundamental research. Moreover, the emergence of various extraordinary phenomena, such as, spin reorientation, metamagnetic transition, multiferroicity, and reversed exchange bias effect, in the complete solid-solution between rare-earth orthochromites, orthoferrites, and cobaltites [32][33][34][35][36][37][38][39][40][41][42][43][44][45] stimulated us to revisit the solid-solution of rare-earth orthochromites and orthoferrites, and explore some intriguing physical characteristics in more detail. In this context, we choose to investigate YbCr 1−x Fe x O 3 , as the parent compound YbCrO 3 exhibits many interesting magnetic properties; whereas, Fe doping might provide the suitable platform to induce complex magnetic ordering, and type-II multiferroicity (and/or, magnetoelectric coupling) through local charge ordering and/or, magnetic frustration [46].…”

Reversed exchange-bias effect associated with magnetization reversal in the weak ferrimagnet LuFe0.5Cr0.5O3

“…Revival of the interest in orthoferrites-orthochromites, first of all in YFe 1-x Cr x O 3 , in the last decade [20,[23][24][25][26] was stimulated by perspectives to find the magnetization reversal and EB effects, that are very promising in view of possible applications. Both effects have been recently reported for several ferrite-chromite systems such as YFe 0.5 Cr 0.5 O 3 [27,28], Y 1-x Ho x Fe 0.5 Cr 0.5 O 3 (x = 0, 0.05, 0.1) [29], LaCr 1-x Fe x O 3 (x = 0.4 to 0.6) [30], NdCr 1-x Fe x O 3 (x = 0.05−0.2) [31], and NdFe 0.5 Cr 0.5 O 3 [32], and were discussed in terms of competition between the DM interaction and single-ion magnetic anisotropy [27][28][29][30][31]. It should be noted, however, that in these publications hysteresis loops were recorded with very small values of maximal field H max of 5-10 kOe [27,28,30,31] and these curves do not show any reversible part, where the ascending and descending branches of the loops coincide, so they actually represent minor hysteresis loops.…”

“…Both effects have been recently reported for several ferrite-chromite systems such as YFe 0.5 Cr 0.5 O 3 [27,28], Y 1-x Ho x Fe 0.5 Cr 0.5 O 3 (x = 0, 0.05, 0.1) [29], LaCr 1-x Fe x O 3 (x = 0.4 to 0.6) [30], NdCr 1-x Fe x O 3 (x = 0.05−0.2) [31], and NdFe 0.5 Cr 0.5 O 3 [32], and were discussed in terms of competition between the DM interaction and single-ion magnetic anisotropy [27][28][29][30][31]. It should be noted, however, that in these publications hysteresis loops were recorded with very small values of maximal field H max of 5-10 kOe [27,28,30,31] and these curves do not show any reversible part, where the ascending and descending branches of the loops coincide, so they actually represent minor hysteresis loops. It is well known that such curves are naturally displaced from the origin which, however, is irrelevant to the exchange-bias phenomenon [33,34].…”