Presence of Cluster Spin-Glass Phase in Naturally Grown Bilayered Brownmillerite Compound Ca[sub 2.4]La[sub 0.1]Sr[sub 0.5]GaMn[sub 2]O[sub 8]

2011 ◽  
Author(s):  
A. K. Bera ◽  
S. M. Yusuf ◽  
Amitabha Ghoshray ◽  
Bilwadal Bandyopadhyay ◽  
Chandan Mazumdar
Keyword(s):  
Spin Glass ◽  
Glass Phase ◽  
Spin Glass Phase ◽  
Cluster Spin Glass

THE CLUSTER SPIN-GLASS PHASE IN La2-xMxCuO4 (M=Sr OR Ba) AS AC PRECURSOR OF STRIPES

2000 ◽  
Vol 14 (29n31) ◽  
pp. 3632-3636
Author(s):  
A. PAOLONE ◽  
F. CORDERO ◽  
R. CANTELLI ◽  
M. FERRETTI
Keyword(s):  
Glass Transition ◽  
Spin Glass ◽  
Glass Phase ◽  
Acoustic Spectrum ◽  
Spin Glass Phase ◽  
Spin Glass Transition ◽  
Cluster Spin Glass ◽  
Good Agreement

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.

scholarly journals 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

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.

Anelastic spectroscopy of the cluster spin-glass phase inLa2−xSrxCuO4

2000 ◽  
Vol 62 (9) ◽  
pp. 5309-5312 ◽  
Author(s):  
F. Cordero ◽  
A. Paolone ◽  
R. Cantelli ◽  
M. Ferretti
Keyword(s):  
Spin Glass ◽  
Glass Phase ◽  
Spin Glass Phase ◽  
Cluster Spin Glass
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