Spin-glass behavior and zero-field-cooled exchange bias in a Cr-based antiperovskite compound PdNCr₃

Abstract

The nature of spin-glass behavior and zero-field-cooled exchange bias of antiperovskite PdNCr3 has been confirmed via the combination of experiment measurements and theoretical calculations.

Positive to negative zero-field cooled exchange bias in La0.5Sr0.5Mn0.8Co0.2O3 ceramics

“…Usually in the negative FC and ZFC-EB effects, the absolute value of H EB ( H EB < 0) approximately linearly decreases with increasing temperature and gradually disappears around the blocking temperature T B , which can be attributed to the decrease of the AFM anisotropy paralleling to the direction of positive magnetic field with the increase of temperature 13 16 17 18 19 20 21 29 . However, if there is AFM bidomain in the initial state, the decrease of the anisotropy of the right AFM domain would decrease the needed to generate the rotation of the interfacial AFM spins from negative to positive direction.…”

“…From then on, the ZFC-EB effect has been observed in different systems, such as Mn 2 PtGa alloy 14 , BiFeO 3 –Bi 2 Fe 4 O 9 nanocomposite 15 , YMnO 3 nanoparticles 16 , Ni 2 Mn 1.4 Ga 0.6 alloy 17 , La 1.5 Sr 0.5 CoMnO 6 polycrystalline ceramics 18 , Pr 1− x Ca x MnO 3 nanosheet 19 , Ni 50 Mn 36 Co 4 Sn 10 alloy 20 , antiperovskite compound PdNCr 3 21 , Co 0.8 Cu 0.2 Cr 2 O 4 22 and Y 0.9 Pr 0.1 CrO 3 ceramics 23 . In most cases, the appearance of such ZFC-EB effect is related to newly established interface with AFM unidirectional anisotropy, and the formation or growth of FM (or superferromagnet, SFM) domains at the expense of pinning subsystem (AFM matrix or spin glass) has been proposed as a possible way 13 16 17 18 19 20 21 . However, almost all these studies show only the negative ZFC-EB effect, in another word, shift of the hysteresis loop in the opposite direction to the initial magnetization field.…”

Spin-glass behavior of Sn0.9Fe3.1N: An experimental and quantum-theoretical study

“…Both nitrides and carbides adopt a simple antiperovskite-like structure in space group Pm3;¯m and feature remarkable properties, such as giant magnetoresistance effect (GMR), 2-4 negative or zero thermal expansion (NTE or ZTE), [5][6][7] nearly zero temperature coefficient of resistance (TCR), 8,9 giant magnetostriction (MS), 10 giant barocaloric effect, 11 spin-glass behavior, [12][13][14][15][16][17][18][19] and phase separation. 20 These properties have been mostly found in Mn-based nitrides (AMn 3 N) [5][6][7][8][9][10][11][12][13][14][15][16] but recent investigations also focused on Ni-, 17 Co-, 17 and Cr- systems, a frustrated system was described for the amorphous binary alloy Fe x Sn 1−x where structural disorder comes together with site disorder.…”

Exchange bias and spin glass behavior in biphasic NiFe2O4/NiO thin films

“…In the present case however, EB was observed after the sample was field cooled through a much lower temperature of 300 K, and it is rather large (H EB ¼2 kOe), suggesting that another magnetic phase is coupling to the reversible spins of NiFe 2 O 4 . Furthermore, the openness of the M-H loop and the unsaturated behavior at relatively high fields of 20 kOe are characteristic of coupling from a spin disordered or spin glass (SG)-like phase [41]. It is well known that the surface layers of ferrites, when confined to the nanoscale, show SG behavior at low temperatures due to finite size effects and/or structural disorder at the surface [23,24].…”