Ce3Cu3Sb4: A semimetal with a spontaneous magnetic moment

1999 ◽  
Vol 60 (13) ◽  
pp. 9518-9524 ◽  
Author(s):  
P. Wachter ◽  
L. Degiorgi ◽  
G. Wetzel ◽  
H. Schwer
Keyword(s):  
Magnetic Moment ◽  
Spontaneous Magnetic Moment

scholarly journals Directed synthesis of a hybrid improper magnetoelectric multiferroic material

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Tong Zhu ◽  
Fabio Orlandi ◽  
Pascal Manuel ◽  
Alexandra S. Gibbs ◽  
Weiguo Zhang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Magnetic Moment ◽  
Ferroelectric Material ◽  
Polar Phase ◽  
Antiferromagnetic State ◽  
Exchange Reactions ◽  
Polar Structure ◽  
Directed Synthesis ◽  
Atom Displacement ◽  
Spontaneous Magnetic Moment

AbstractPreparing materials which simultaneously exhibit spontaneous magnetic and electrical polarisations is challenging as the electronic features which are typically used to stabilise each of these two polarisations in materials are contradictory. Here we show that by performing low-temperature cation-exchange reactions on a hybrid improper ferroelectric material, Li2SrTa2O7, which adopts a polar structure due to a cooperative tilting of its constituent TaO6 octahedra rather than an electronically driven atom displacement, a paramagnetic polar phase, MnSrTa2O7, can be prepared. On cooling below 43 K the Mn2+ centres in MnSrTa2O7 adopt a canted antiferromagnetic state, with a small spontaneous magnetic moment. On further cooling to 38 K there is a further transition in which the size of the ferromagnetic moment increases coincident with a decrease in magnitude of the polar distortion, consistent with a coupling between the two polarisations.

Transition from Itinerant Electron Magnetism to Localized Spin Magnetism in Ni3Al1-YMny Alloys

2010 ◽  
Vol 168-169 ◽  
pp. 149-152 ◽  
Author(s):  
A.V. Korolyov ◽  
N.I. Kourov ◽  
S.Z. Nazarova ◽  
Y.A. Dorofeev ◽  
N.V. Volkova ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Curie Temperature ◽  
Magnetic Moment ◽  
Effective Magnetic Moment ◽  
Average Distance ◽  
Magnetic Moments ◽  
Itinerant Electron ◽  
Spin Magnetism ◽  
Spontaneous Magnetic Moment

Magnetic properties of Ni3Al1-yMny alloys at y≤0.6 were investigated at T≤400 K in magnetic fields H≤4 MA/m. The concentration y dependencies of the spontaneous magnetic moment s, the effective magnetic moment eff, the Curie temperature ТС, the Weiss constant , and the temperature independent part of the magnetic susceptibility 0 were determined. The behavior of the Rhodes-Wohlfarth parameter р(y) in the transition region from the itinerant electron magnetism to the spin localized one is related to the increase in the spontaneous magnetic moment of Ni atoms inversely proportional to the average distance between Mn atoms with the highly localized magnetic moments.

Influence of Ru on the Magnetic Properties of Y2T17 (T = Co, Fe)

2012 ◽  
Vol 194 ◽  
pp. 50-53 ◽  
Author(s):  
Alexander V. Andreev ◽  
Denis I. Gorbunov ◽  
Evgeniya A. Tereshina ◽  
Josef Šebek ◽  
Eva Šantavá ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Curie Temperature ◽  
Magnetic Moment ◽  
Anisotropy Constant ◽  
Hexagonal Structure ◽  
Metamagnetic Transition ◽  
Single Crystalline ◽  
Spontaneous Magnetic Moment

Influence of Ru substitution on magnetic properties of Y2Fe17and Y2Co17(hexagonal structure of the Th2Ni17-type) has been studied on single-crystalline samples. Whereas in the Y2Fe17-xRuxsystem ferromagnetism is transformed rapidly into antiferromagnetism with a field-induced metamagnetic transition, in Y2Co17-xRuxonly a monotonous decrease of spontaneous magnetic moment, Curie temperature and first anisotropy constant is observed.

scholarly journals Non-zero spontaneous magnetic moment along crystalline b-axis for rare earth orthoferrites

2020 ◽  
Vol 127 (11) ◽  
pp. 113906
Author(s):  
Mohanad H. Mohammed ◽  
Z. X. Cheng ◽  
Shixun Cao ◽  
K. C. Rule ◽  
C. Richardson ◽  
...  
Keyword(s):  
Rare Earth ◽  
Magnetic Moment ◽  
Spontaneous Magnetic Moment

scholarly journals Experimental observation and theoretical analysis of spontaneous magnetic moment of Rb atom clusters

2021 ◽  
Vol 70 (12) ◽  
pp. 122101-122101
Author(s):  
Di Shu-Hong ◽  
◽  
Zhang Yang ◽  
Yang Hui-Jing ◽  
San Xing-Yuan ◽  
...  
Keyword(s):  
Theoretical Analysis ◽  
Experimental Observation ◽  
Magnetic Moment ◽  
Atom Clusters ◽  
Spontaneous Magnetic Moment

Magnetic properties of Tb2(Fe,Si)17 single crystals

1999 ◽  
Vol 14 (7) ◽  
pp. 2697-2700 ◽  
Author(s):  
Y. X. Li ◽  
S. X. Gao ◽  
J. Du ◽  
C. C. Tang ◽  
C. Cai ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Domain Wall ◽  
Curie Temperature ◽  
Single Crystals ◽  
Magnetic Moment ◽  
Single Crystalline ◽  
Domain Wall Pinning ◽  
Spontaneous Magnetic Moment

The magnetic properties of single-crystalline Tb2Fe17−xSix (x = 0, 1, 2, 3, and 3.3) have been investigated. The Si substitution constricted the lattices by 1.5% and caused the Th2Ni17 transfer to Th2Zn17. The Curie temperature increased from 413 to 526 K, and the spontaneous magnetic moment decreased from 82.6 to 46.4 emu/g with the increase of Si. The stronger anisotropy and coercivity were generated by Si occupying the Fe sublattices. A domain wall pinning-dominated mechanism was responsible for increasing the coercivity force from 0.01 T (x = 1) to about 0.36 T (x = 3.3) at 1.5 K.

MAGNETIC PROPERTIES Cu DOPED ZnO:Fe SEMICONDUCTORS

2010 ◽  
Vol 09 (06) ◽  
pp. 591-594
Author(s):  
KH. A. ZIQ ◽  
A. ISMAIL
Keyword(s):  
Field Theory ◽  
Magnetic Properties ◽  
Magnetic Susceptibility ◽  
Exchange Interaction ◽  
Magnetic Moment ◽  
Low Temperatures ◽  
Cu Doping ◽  
Hysteresis Losses ◽  
Ferromagnetic Exchange ◽  
Spontaneous Magnetic Moment

Magnetization measurements were performed on a series of Zn 0.9-x Fe 0.1 Cu x O samples (0 ≤ x ≤ 0.10). Small hysteresis losses are seen at low temperatures. The ferromagnetic exchange interaction has been evaluated from the inverse DC magnetic susceptibility versus T and the molecular field theory. We found that Cu -doping greatly enhances the FM exchange interaction, increases the saturation magnetization, hysteresis losses and the magnetic susceptibility. Arrott-Kouvel plot has been used to study the spontaneous magnetic moment at low temperatures. We show that hysteresis losses cannot be taken as the only evidence for the appearance of the ferromagnetic order in these semiconducting semi-magnetic materials.

scholarly journals Longitudinal remagnetization of uniaxial antiferromagnetic nanoparticles: the role of spontaneous magnetic moment

2022 ◽  
Vol 380 (2217) ◽  
Author(s):  
Igor S. Poperechny
Keyword(s):  
Kinetic Theory ◽  
Magnetic Moment ◽  
Wide Frequency Range ◽  
Magnetic Response ◽  
Anisotropy Axis ◽  
Relaxation Mode ◽  
A Value ◽  
Variation Rate ◽  
Spontaneous Magnetic Moment

A kinetic theory of magnetic response of uniaxial antiferromagnetic nanoparticles is presented. Within the developed framework, a particular case when an external field is applied strictly along the anisotropy axis is considered in detail. Analysis of the relaxation spectrum of an antiferromagnetic particle with a spontaneous magnetic moment is performed. It is shown that in a wide frequency range the magnetic response of such particle is determined entirely by the relaxation mode with the longest time. An analytical expression for this time that explicitly contains a value of the decompensation magnetic moment is derived. Also, simple formulae for both static and dynamic longitudinal magnetic susceptibility of an antiferromagnetic nanoparticle are obtained. According to them, longitudinal susceptibility grows quadratically with the value of the spontaneous magnetic moment. Besides, if the latter is not zero, the change of the static susceptibility with temperature turns out to be non-monotonic. The influence of the spontaneous magnetic moment of the particle on the magnetization curves in strong fields is analysed using both energy approach and kinetic theory. The calculated dependences of the dynamic coercivity on the amplitude and variation rate of the applied field are qualitatively compared with experimental data. This article is part of the theme issue ‘Transport phenomena in complex systems (part 2)’.

Sign in / Sign up

Export Citation Format

Share Document