Magnetoelastic waves in spin glass with remanent spontaneous magnetization

2000 ◽  
Vol 87 (9) ◽  
pp. 5917-5919 ◽  
Author(s):  
A. Janutka ◽  
P. Rusek
Keyword(s):  
Spin Glass ◽  
Spontaneous Magnetization ◽  
Magnetoelastic Waves

Suppression of Spin-Glass State in PrB6

2012 ◽  
Vol 190 ◽  
pp. 221-224 ◽  
Author(s):  
M.A. Anisimov ◽  
A.V. Bogach ◽  
V.V. Glushkov ◽  
S.V. Demishev ◽  
N.A. Samarin ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Spin Glass ◽  
Single Crystals ◽  
Phase Formation ◽  
Spontaneous Magnetization ◽  
Initial State ◽  
High Quality ◽  
Wide Range ◽  
Comprehensive Study

The comprehensive study of transverse magnetoresistance (MR) and magnetization has been carried out on the high quality single crystals of PrB6 in the wide range of temperatures 2-40K and magnetic fields up to 80kOe. In order to estimate the role of boron vacancies in the formation of the new spin-glass (SG) phase detected by Alekseev et al. below 20K the experiments were carried out on the ordinary (initial state) and annealed single crystals of PrB6. The data obtained demonstrate the appearance of spontaneous magnetization below TSG21.3K with M~1.6 emu/mol for initial state and the absence of spontaneous magnetization for the annealed PrB6 samples. On the contrary, quite similar behavior of MR was detected for various samples of PrB6. Our results suggest the existence of the aggregated boron vacancies which provoke the new SG phase formation in PrB6 at TSG.

Spin Glassiness and Ferromagnetism in Disordered Ni-Mn Alloys

1982 ◽  
Vol 19 ◽  
Author(s):  
James S. Kouvel
Keyword(s):  
Spin Glass ◽  
Critical Field ◽  
Curie Point ◽  
Magnetic Measurements ◽  
Spontaneous Magnetization ◽  
Uniaxial Anisotropy ◽  
Hysteresis Loops ◽  
Initial Susceptibility ◽  
Unidirectional Anisotropy ◽  
Glass Properties

ABSTRACTFrom magnetic measurements, the alloy Ni78Mn22 is found to undergo a field-induced transition from spin glassiness to ferromagnetism at a critical field that decreases from ∼140 Oe to zero as the temperature is raised from 4.2 K to 40 K, the ferromagnetic Curie point being ∼270 K. The alloy Ni74Mn26 is found to transform at 80 K from a spin glass to a state of infinite initial susceptibility but no spontaneous magnetization and to remain so up to 155 K, where it becomes paramagnetic. The spin-glass properties of Ni78Mn22 below 40 K and of Ni74Mn26 below 80 K include displaced hysteresis loops produced by cooling in a field. The changes in the hysteresis loops upon subsequent warming correspond to a gradual conversion of a unidirectional anisotropy to a uniaxial anisotropy.

Giant Magnitostriction of Diluted Nickel Ferrite NiGa0.8Al0.8Fe0.4O4 with Frustrated Magnetic Structure

2009 ◽  
Vol 152-153 ◽  
pp. 97-99 ◽  
Author(s):  
L.G. Antoshina ◽  
A.B. Korshak
Keyword(s):  
Magnetic Properties ◽  
Coercive Force ◽  
Spin Glass ◽  
Magnetic Structure ◽  
Nickel Ferrite ◽  
Glass Phase ◽  
Spontaneous Magnetization ◽  
Anomalous Behaviour ◽  
Volume Magnetostriction ◽  
Spin Glass Phase

The investigation of magnetic properties of diluted ferrite NiGa0.8Al0.8Fe0.4O4 is carried out. Anomalous behaviour of spontaneous magnetization σs(T), coercive force Hc(T) and volume magnetostriction ω(T) is revealed for the sample with frustrated magnetic structure. It is found that volume magnetostriction ω reaches very large (that is to say “giant”) values (ω ~ 5•10–4) (for T = 84 K). It is revealed that the derivative dω/dH is equal ≈ 43 • 10–9 Oe–1 (for T = 84 K). The assumption is made that the size of clusters is about 3 nm in the spin glass phase (for Tt < T < TC).

Negative spontaneous magnetization and semi-spin glass magnetic order in mixed spinel Co0.6Zn0.4Fe1.7Mn0.3O4

2015 ◽  
Vol 118 (13) ◽  
pp. 133902 ◽  
Author(s):  
Arti Gupta ◽  
R. P. Tandon ◽  
A. B. Shinde ◽  
P. S. R. Krishna ◽  
Ratnamala Chatterjee
Keyword(s):  
Spin Glass ◽  
Magnetic Order ◽  
Spontaneous Magnetization ◽  
Mixed Spinel

The Potts spin-glass in a transverse field

1992 ◽  
Vol 2 (1) ◽  
pp. 31-39 ◽  
Author(s):  
Yadin Y. Goldschmidt
Keyword(s):  
Spin Glass ◽  
Transverse Field

The ground state energy of the ±J spin glass from the genetic algorithm

1994 ◽  
Vol 4 (9) ◽  
pp. 1281-1285 ◽  
Author(s):  
P. Sutton ◽  
D. L. Hunter ◽  
N. Jan
Keyword(s):  
Genetic Algorithm ◽  
Spin Glass ◽  
Ground State Energy ◽  
Ground State ◽  
State Energy
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