Discovery of a High Spin Freezing Temperature and Control of a Spin-Glass State in Mg1.5FeTi0.5O4 Spinel Films

1999 ◽  
Vol 602 ◽  
Author(s):  
Y. Muraoka ◽  
H. Tabata ◽  
T. Kawai
Keyword(s):  
Spin Glass ◽  
Spinel Ferrite ◽  
Freezing Temperature ◽  
Spin Glass State ◽  
Light Irradiation ◽  
Zero Field ◽  
Glass State ◽  
Spin Freezing ◽  
Long Time ◽  
And Control

AbstractA spin-glass state up to 210 K has been found in (Mg,Fe){Mg,Fe,Ti)2O4 spinel ferrite thin films formed on α-Al2O3(0001) substrates. The long-time relaxation of the magnetization in zero-field-cooled operation, which is characteristic feature of the spin-glass state, has been observed below 210 K. We have also achieved the change of magnetic state in the film from spin-glass to ferrimagnet over a wide temperature range below 160 K by means of light-irradiation. The amount of spin-melt on light-irradiation is calculated to be 41 % at 10 K and 26 % at 100 K.

Photocontrol of spin-glass state in Mg1.5FeTi0.5O4 spinel ferrite films

2000 ◽  
Vol 76 (9) ◽  
pp. 1179-1181 ◽  
Author(s):  
Y. Muraoka ◽  
H. Tabata ◽  
T. Kawai
Keyword(s):  
Spin Glass ◽  
Spinel Ferrite ◽  
Spin Glass State ◽  
Glass State ◽  
Ferrite Films

Photoexcited spin-glass state in (Mg, Fe){Mg,Fe,Ti}O4 spinel ferrite films

2000 ◽  
Vol 88 (12) ◽  
pp. 7223-7229 ◽  
Author(s):  
Yuji Muraoka ◽  
Hitoshi Tabata ◽  
Tomoji Kawai
Keyword(s):  
Spin Glass ◽  
Spinel Ferrite ◽  
Spin Glass State ◽  
Glass State ◽  
Ferrite Films

AC Magnetic Response of an Ni81Mn19 Alloy

1998 ◽  
Vol 12 (02) ◽  
pp. 143-154 ◽  
Author(s):  
A. Gencer ◽  
I. Ercan
Keyword(s):  
Spin Glass ◽  
Magnetic Measurements ◽  
Ac Susceptibility ◽  
Magnetic Domain ◽  
Freezing Temperature ◽  
Spin Glass State ◽  
Glass State ◽  
Low Field ◽  
Ferromagnetic Domains ◽  
Measuring Field

Low field magnetic measurements of a re-entrant system Ni 81 Mn 91 as a function of temperature are shown to exhibit two successive transitions. The ac susceptibility shows strong frequency dependence due to the frustrated spins. The freezing temperature, Tf, shifts to higher temperatures with increasing frequency and decreasing ac field amplitude. Its dependence on frequency is associated with the viscuous relaxation of spins during an ac cycle of the measuring field, which can be attributed to the magnetic relaxation of spin clusters. The results support the theory that re-entrant spin glass state is coexistent with the ferromagnetic domains and that no real phase transition to a spin glass state seems to occur. The interplay of magnetic domain formation and movement with the so-called frustrated spins appears to be responsible for the observed dependences.

Spin-glass state induced low field magnetization-step effect in a Hg1−x Mn x Te single crystal

2016 ◽  
Vol 253 (10) ◽  
pp. 2015-2019
Author(s):  
Liangqing Zhu ◽  
Jun Shao ◽  
Liang Zhu ◽  
Xiren Chen ◽  
Tie Lin ◽  
...  
Keyword(s):  
Single Crystal ◽  
Spin Glass ◽  
Spin Glass State ◽  
Glass State ◽  
Low Field ◽  
Field Magnetization ◽  
Step Effect

scholarly journals Reentrant-spin-glass state inNi2Mn1.36Sn0.64shape-memory alloy

2009 ◽  
Vol 79 (9) ◽  
Author(s):  
S. Chatterjee ◽  
S. Giri ◽  
S. K. De ◽  
S. Majumdar
Keyword(s):  
Spin Glass ◽  
Spin Glass State ◽  
Glass State ◽  
Reentrant Spin Glass

scholarly journals Spin glass state and enhanced spiral phase in doped delafossite oxideCuCrO2

2016 ◽  
Vol 94 (2) ◽  
Author(s):  
Z. R. Yan ◽  
M. H. Qin ◽  
S. Dong ◽  
M. Zeng ◽  
X. B. Lu ◽  
...  
Keyword(s):  
Spin Glass ◽  
Spin Glass State ◽  
Glass State ◽  
Spiral Phase
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