Supermagnetism

S Bedanta, W Kleemann - Journal of Physics D: Applied Physics, 2008‏ - iopscience.iop.org
An ensemble of nanoparticles in which the inter-particle magnetic interactions are
sufficiently weak shows superparamagnetic behaviour as described by the Néel–Brown …

Superparamagnetic nanoparticle ensembles

O Petracic - Superlattices and Microstructures, 2010‏ - Elsevier
Magnetic single-domain nanoparticles constitute an important model system in magnetism.
In particular, ensembles of superparamagnetic nanoparticles can exhibit a rich variety of …

[کتاب][B] Handbook of magnetic materials

KHJ Buschow - 2003‏ - books.google.com
Volume 15 of the Handbook on the Properties of Magnetic Materials, as the preceding
volumes, has a dual purpose. As a textbook it is intended to be of assistance to those who …

Large magnetic cooling power involving frustrated antiferromagnetic spin-glass state in

S Pakhira, C Mazumdar, R Ranganathan, S Giri… - Physical Review B, 2016‏ - APS
The ternary intermetallic compounds Gd 2 NiSi 3 and Er 2 NiSi 3 are synthesized in
chemically single phase, which are characterized using dc magnetization, ac magnetic …

Aging and memory effects in superparamagnets and superspin glasses

M Sasaki, PE Jönsson, H Takayama, H Mamiya - Physical Review B …, 2005‏ - APS
Many dense magnetic nanoparticle systems exhibit slow dynamics which is qualitatively
indistinguishable from that observed in atomic spin glasses and its origin is attributed to …

Memory effects in an interacting magnetic nanoparticle system

Y Sun, MB Salamon, K Garnier, RS Averback - Physical review letters, 2003‏ - APS
We have performed a series of measurements to study the low temperature dynamics of an
interacting magnetic nanoparticle system. The results obtained demonstrate striking memory …

Observation of superspin-glass behavior in nanoparticles

M Suzuki, SI Fullem, IS Suzuki, L Wang… - Physical Review B …, 2009‏ - APS
The aging and memory effects of Fe 3 O 4 nanoparticles have been studied using a series of
zero-field-cooled (ZFC) and field-cooled magnetization measurements at various aging …

Collective states of interacting ferromagnetic nanoparticles

O Petracic, X Chen, S Bedanta, W Kleemann… - Journal of Magnetism …, 2006‏ - Elsevier
Discontinuous magnetic multilayers [CoFe/Al2O3] are studied by use of magnetometry,
susceptometry and numeric simulations. Soft ferromagnetic Co80Fe20 nanoparticles are …

Crossover from individual to collective magnetism in dense nanoparticle systems: local anisotropy versus dipolar interactions

EH Sánchez, M Vasilakaki, SS Lee, PS Normile… - Small, 2022‏ - Wiley Online Library
Dense systems of magnetic nanoparticles may exhibit dipolar collective behavior. However,
two fundamental questions remain unsolved: i) whether the transition temperature may be …

Spin-glass-like freezing of inner and outer surface layers in hollow γ-Fe2O3 nanoparticles

H Khurshid, P Lampen-Kelley, Ò Iglesias, J Alonso… - Scientific reports, 2015‏ - nature.com
Disorder among surface spins is a dominant factor in the magnetic response of magnetic
nanoparticle systems. In this work, we examine time-dependent magnetization in high …