Spin glass behaviour: Magnetic, microstructural and exchange bias properties in Mn rich heulser alloy ribbons

2020 ◽  
Author(s):  
Jyoti Sharma ◽  
K. G. Suresh ◽  
M. Manivel Raja ◽  
Pravin Walke
Keyword(s):  
Spin Glass ◽  
Exchange Bias ◽  
Spin Glass Behaviour

scholarly journals Exchange-bias and magnetic anisotropy fields in core–shell ferrite nanoparticles

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
F. G. Silva ◽  
J. Depeyrot ◽  
Yu. L. Raikher ◽  
V. I. Stepanov ◽  
I. S. Poperechny ◽  
...  
Keyword(s):  
Spin Glass ◽  
Magnetic Moment ◽  
Exchange Bias ◽  
Uniaxial Anisotropy ◽  
Thermal Fluctuations ◽  
High Amplitude ◽  
Spin Coupling ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Core Shell Nanoparticles

AbstractExchange bias properties of MnFe$$_2$$ 2 O$$_4$$ 4 @$$\gamma$$ γ –Fe$$_2$$ 2 O$$_3$$ 3 core–shell nanoparticles are investigated. The measured field and temperature dependencies of the magnetization point out a well-ordered ferrimagnetic core surrounded by a layer with spin glass-like arrangement. Quasi-static SQUID magnetization measurements are presented along with high-amplitude pulse ones and are cross-analyzed by comparison against ferromagnetic resonance experiments at 9 GHz. These measurements allow one to discern three types of magnetic anisotropies affecting the dynamics of the magnetic moment of the well-ordered ferrimagnetic NP’s core viz. the easy-axis (uniaxial) anisotropy, the unidirectional exchange-bias anisotropy and the rotatable anisotropy. The uniaxial anisotropy originates from the structural core–shell interface. The unidirectional exchange-bias anisotropy is associated with the spin-coupling at the ferrimagnetic/spin glass-like interface; it is observable only at low temperatures after a field-cooling process. The rotatable anisotropy is caused by partially-pinned spins at the core/shell interface; it manifests itself as an intrinsic field always parallel to the external applied magnetic field. The whole set of experimental results is interpreted in the framework of superparamagnetic theory, i.e., essentially taking into account the effect of thermal fluctuations on the magnetic moment of the particle core. In particular, it is found that the rotatable anisotropy of our system is of a uniaxial type.

scholarly journals Tailoring exchange bias in reentrant spin glass by ferromagnetic cluster size engineering

APL Materials ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 011104
Author(s):  
Fanghua Tian ◽  
Xiaoqin Ke ◽  
Kaiyan Cao ◽  
Dingchen Wang ◽  
Qizhong Zhao ◽  
...  
Keyword(s):  
Spin Glass ◽  
Exchange Bias ◽  
Cluster Size ◽  
Ferromagnetic Cluster ◽  
Reentrant Spin Glass

Spin glass behaviour in chromium spinels

1983 ◽  
Vol 31-34 ◽  
pp. 1393-1394 ◽  
Author(s):  
D. Fiorani ◽  
S. Viticoli ◽  
J.L. Dormann ◽  
M. Nogues ◽  
J.L. Tholence ◽  
...  
Keyword(s):  
Spin Glass ◽  
Spin Glass Behaviour

scholarly journals A new ferromagnetic thiospinel CuCrZrS4with re-entrant spin-glass behaviour

2003 ◽  
Vol 83 (21) ◽  
pp. 2521-2530 ◽  
Author(s):  
Yuji Iijima ◽  
Yasushi Kamei ◽  
Nami Kobayashi ◽  
Junji Awaka ◽  
Taku Iwasa ◽  
...  
Keyword(s):  
Spin Glass ◽  
Spin Glass Behaviour

Spin-glass behaviour of nanocrystalline diamond intercalated with potassium

1997 ◽  
Vol 9 (39) ◽  
pp. 8325-8332 ◽  
Author(s):  
M E Kozlov ◽  
H Uwe ◽  
M Tokumoto ◽  
K Yakushi
Keyword(s):  
Spin Glass ◽  
Nanocrystalline Diamond ◽  
Spin Glass Behaviour

scholarly journals New 10H perovskites Ba5Ln1−xMn4+yO15−δ with spin glass behaviour

RSC Advances ◽  
2017 ◽  
Vol 7 (54) ◽  
pp. 33869-33874
Author(s):  
Congling Yin ◽  
Genfang Tian ◽  
Guobao Li ◽  
Fuhui Liao ◽  
Jianhua Lin
Keyword(s):  
Spin Glass ◽  
Spin Glass Behavior ◽  
Spin Glass Behaviour ◽  
Glass Behavior

New 10H perovskites Ba5Ln1−xMn4+yO15−δ with ordered arrangements of Ln and Mn ions and spin glass behavior were synthesized and investigated.

A new interpretation of Mössbauer spectra of microcrystalline goethite: “Super-ferromagnetism” or “super-spin-glass” behaviour?

1983 ◽  
Vol 40 (1-2) ◽  
pp. 163-174 ◽  
Author(s):  
Steen Mørup ◽  
Morten Bo Madsen ◽  
Jørgen Franck ◽  
Jørgen Villadsen ◽  
Christian J.W. Koch
Keyword(s):  
Spin Glass ◽  
Mössbauer Spectra ◽  
Mossbauer Spectra ◽  
Spin Glass Behaviour ◽  
New Interpretation
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