Study of magnetic relaxation, memory and rejuvenation effects in the cluster spin-glass phase of B-site disordered Ca(Fe1/2Nb1/2)O3 perovskite: Experimental evidence for hierarchical model

A cluster spin-glass transition has been identified in La 1.97 Ba 0.03 CuO 4, thanks to the analogies of the acoustic spectrum of this sample with that of La 2-x Sr x CuO 4 (x=0.03 and x=0.06), which has a well established cluster spin-glass phase. Our measurements are in good agreement with the presence of antiferromagnetically correlated clusters which are separated by hole rich boundaries. These "charge rivers" are thought to be the precursors of stripes.

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Evidence for cluster spin glass phase with precursor short-range antiferromagnetic correlations in the B -site disordered Ca(Fe1/2Nb1/2)O3 perovskite

Physical Review B ◽

10.1103/physrevb.99.214425 ◽

2019 ◽

Vol 99 (21) ◽

Cited By ~ 10

Author(s):

Arun Kumar ◽

Anatoliy Senyshyn ◽

Dhananjai Pandey

Keyword(s):

Spin Glass ◽

Short Range ◽

Glass Phase ◽

Spin Glass Phase ◽

Antiferromagnetic Correlations ◽

Cluster Spin Glass

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Cluster spin glass phase and charge stripe fluctuations in the high-Tc superconductor La2−xSrxCuO4

Journal of Magnetism and Magnetic Materials ◽

10.1016/j.jmmm.2003.11.076 ◽

2004 ◽

Vol 272-276 ◽

pp. 185-186

Author(s):

F Cordero ◽

A Paolone ◽

R Cantelli

Keyword(s):

Spin Glass ◽

Glass Phase ◽

High Tc ◽

High Tc Superconductor ◽

Spin Glass Phase ◽

Cluster Spin Glass ◽

Charge Stripe

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Магнитные фазовые диаграммы R-=SUB=-1-x-=/SUB=-Sr-=SUB=-x-=/SUB=-(Mn-=SUB=-1-x/2-=/SUB=-Sb-=SUB=-x/2-=/SUB=-)O-=SUB=-3-=/SUB=- (R=La, Pr, Nd, Sm, Eu) с ионами марганца в трехвалентном состоянии

Физика твердого тела ◽

10.21883/ftt.2018.09.46389.003 ◽

2018 ◽

Vol 60 (9) ◽

pp. 1717

Author(s):

И.О. Троянчук ◽

М.В. Бушинский ◽

Н.В. Терешко ◽

В. Сиколенко ◽

C. Ritter ◽

...

Keyword(s):

Rare Earth ◽

Spin Glass ◽

Glass Phase ◽

Ionic Radius ◽

Ferromagnetic State ◽

Rare Earth Ions ◽

Antiferromagnetic State ◽

Spin Glass Phase ◽

Cluster Spin Glass ◽

Ferromagnetic Interactions

AbstractThe results of neutron-diffraction, magnetic, and magnetotransport studies of La_1 ‒ x Sr_ x (Mn _1- x /2 ^3+ Sb _ x /2 ^5+ )O_3 ( x ≤ 0.7) pervoskites, which contain only Mn^3+ ions, are reported. It is demonstrated that the system undergoes a transition from the antiferromagnetic state to the ferromagnetic one at x ∼ 0.2. Its structure then changes from O ′-orthorombic to O -orthorombic, which is attributable to orbital disordering. At x ≥ 0.6, the competition between antiferromagnetic and ferromagnetic interactions and strong diamagnetic dilution trigger the emergence of the cluster spin-glass phase. As the ionic radius of rare-earth ions in R_0.7Sr_0.3Mn_0.85Sb_0.15O_3 decreases, the ferromagnetic state transforms gradually into spin glass (R = Sm). All ferromagnetic compositions are dielectric in the magnetically ordered phase with strong magnetoresistive effects. It is assumed that ferromagnetism is induced by the strong covalency and orbital disordering.

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