- Type of paper
: Paper in book
Title: Hall effect in heavy fermion and mixed valence systems
- Authors:
- Hamzić, Amir (15234)
- Fert, Albert
- Editors
- Gupta, L
- Multani, M
Publisher: World Scientific
ISBN: 9810212011
Year: 1993
Pages: from 131 to 166
Number of references: 80
Language: engleski
Summary: Experimental results for Hall effect in heavy fermion and
mixed valence systems are reviewed and discussed in terms
of skew scattering. Some particular features of the Hall
effect at low temperatures (the influence of coherence,
magnetic correlations and the anomalous velocity
contribution) are presented as well. Finally, we present
Hall effect data for an extensive list of systems.
Keywords: heavy fermion systems, mixed valence systems, Hall effect, asymmetric scatterings
Other: pozvani revijalni članak
- Type of paper
: Paper in journal
Title: Magnetoresistance of Fe/Cr superlattices
- Authors:
- Petroff, Frederique
- Barthelemy, Agnes
- Hamzić, Amir (15234)
- Fert, Albert
- Etienne, Patric
- Lequien, S
- Creuzet, Gerard
Journal: Journal of Magnetism and Magnetic Materials
ISSN: 0304-8853
Volume: 93
Year: 1991
Pages: from 95 to 100
Number of references: 14
Language: engleski
Summary: In light of new experimental data on Fe(001)/Cr(001)
superlattices, we discuss the role of the main parameters
involved in the giant magnetoresistance, thickness,
interface roughness and temperature.
Keywords: Fe/Cr superlattice, giant magnetoresistance
- Type of paper
: Paper in journal
Title: Low temperature magnetic relaxation in Bi2Sr2CaCu2O8
- Authors:
- Fruchter, Luc
- Hamzić, Amir (15234)
- Hergt, R
- Campbell, Ian
Journal: Physica B
ISSN: 0921-4526
Volume: 171
Year: 1991
Pages: from 344 to 345
Number of references: 12
Language: engleski
Summary: We have measured the slow magnetic relaxation due to flux
creep in a Bi2Sr2CaCu2O8 sample over the temperature range
0.1-30K. The quasi-logarithmic relaxation does not come to
a halt as the temperature tends to zero, indicating that a
nonactivated relaxation process dominates at low
temperatures.
Keywords: high temperature superconductors, magnetic relaxation
- Type of paper
: Paper in journal
Title: Hall effect in CeCu4Ga and CeCu3Ga2 alloys
- Authors:
- Hamzić, Amir (15234)
- Fert, Albert
- Bauer, E
Journal: Physica B
ISSN: 0921-4526
Volume: 171
Year: 1991
Pages: from 263 to 265
Number of references: 14
Language: engleski
Summary: We present Hall effect measurements on disordered
(Ce(CuxGa1-x)5 Kondo alloys (x=0.8 and x=0.6) in the
temperature interval 0.1 to 200 K and in the magnetic
fields up to 7 T. We observe a continuous increase of the
Hall constant RH(T) at low temperatures, which is typical
of incoherent Kondo systems. In CeCu4Ga, RH(T) exhibits
also a weak maximum at ÷ 0.3 K. Above the Kondo
temperature, RH(T) is well described by a single impurity
skew scattering model. In addition, magnetoresistivity
data for CeCu4Ga (T > 0.2 K) are presented, showing
different behaviour for temperatures below and above 2 K.
Keywords: heavy fermion systems, Hall effect, asymmtric scattering
- Type of paper
: Paper in journal
Title: Magnetotransport properties of YbNiSn
- Authors:
- D Onofrio, Lissetta
- Hamzić, Amir (15234)
- Fert, Albert
Journal: Physica B
ISSN: 0921-4526
Volume: 171
Year: 1991
Pages: from 266 to 268
Number of references: 9
Language: engleski
Summary: We report Hall effect (1.3 - 30 K) and magnetoresistivity
(1.3 - 20 K) measurements on YbNiSn compound. It has been
found that it is a Kondo lattice system with a
ferromagnetic ordering below Tc = 5.5 K. We observed that
the Hall constant RH(T) increases as the temperature
decreases and has a sharp peak at about Tc. Also, below
Tc, the Hall resistivity versus H curves exhibit a
highly non-linear magnetic field dependence with features
suggesting a crossover to a new electronic state above 2
T. The magnetoresistivity is high with a magnetic field
dependence similar to that of Hall resistivity.
Keywords: heavy fermions, Hall effect, magnetoresistivity, magnetic order
- Type of paper
: Paper in journal
Title: Pressure dependence of the Curie temperature in the Kondo
lattice compound YbNiSn
- Authors:
- Sparn, G
- Thompson, Joe
- Hamzić, Amir (15234)
Journal: Journal of Alloys and Compounds
Volume: 181
Year: 1992
Pages: from 197 to 203
Number of references: 18
Language: engleski
Summary: We have measured the magnetic susceptibility (2 K < T <
300 K) and the electrical resistivity under pressure (1.2
K < T < 300 K: p < 20 kbar) of the Kondo lattice compound
YbNiSn, which may be considered as the "hole" analogue of
the isostructural compound CeNiSn. In contrast with
CeNiSn, YbNiSn does not show an energy gap at low
temperatures but instead ungergoes a magnetic phase
transition at TM= 5.5K. The magnetic state might be either
a weakly ferromagnetic or a complex antiferromagnetic state.
By applying pressure the room temperature resistivity thetemperature
resistivity (rRT) decreases, while TM increases.
This behaviour can be interpreted with respect to Doniach's
Kondo necklace model as a decrease in the local exchange
coupling constant J with increasing pressure, which
reduces Kondo spin compensation and favors long-range
magnetic order. These results show that the idea that
YbNiSn is the hole counterpart to CeNiSn holds well for
the properties such as dTM/dP and drRT/dP but it fails in
more detailed aspects, such as the origin of the energy
gap formation.
Keywords: heavy fermion systems, magnetic susceptibility, electrical resistivity, Curie temperature,
- Type of paper
: Paper in journal
Title: YbNiSn, a ferromagnetic Kondo lattice
- Authors:
- Bonville, Pierre
- Bellot, P
- Hodges, J
- Imbert, P
- Jehanno, G
- Le Bras, G
- Hammann, J
- Leylekian, L
- Chevrier, G
- Thuery, P
- D Onofrio, Lissetta
- Hamzić, Amir (15234)
- Barthelemy, Agnes
Journal: Physica B
ISSN: 0921-4526
Volume: 182
Year: 1992
Pages: from 105 to 117
Number of references: 22
Language: engleski
Summary: We present an investigation of the low temperature
properties of the ternary intermetallic alloy YbNiSn by X-ray and
neutrondiffraction, resistivity, magnetisation and Mossbauerspectroscopy
measurements. It is shown that YbNiSn is aferromagnet (Tc=5.65 K) with the
Yb3+ magnetic moments lyingalong the orthorhombic c axis. At low
temperatures a stronganisotropy of the interionic coupling is evidenced,
whichcompetes with the Crystal Electric Field anisotropy, leading tothe
unusual situation where the ferromagnetic moments do not liealong the easy
magnetisation axis a. Hybridisation of the 4felectrons with band electrons
leads to a reduction of thespontaneous moment and is likely to be the
origin of the largevalue of the molecular field constant, as well as of
theanisotropy of the exchange interaction and of the resistivity.
Keywords: heavy fermion system, magnetism, exchange interaction, crystal electric field, magnetisation, neutron diffraction, Mossbauer effect, electrical resistivity, magnetic anisotropy
- Type of paper
: Paper in journal
Title: Magnetic field influence on the low and high electric
field transport in the spin-density wave state of the organic conductor
(TMTSF)2NO3
- Authors:
- Basletić, Mario (197593)
- Biškup, Neven (179286)
- Tomić, Silvia (65594)
- Korin-Hamzić, Bojana (61314)
- Hamzić, Amir (15234)
Journal: Synthetic Metals
ISSN: 0379-6779
Volume: 55
Year: 1993
Pages: from 2593 to 2598
Number of references: 12
Language: engleski
Summary: We have studied the influence of the magnetic field in the
plane perpendicular to the highly conducting axis on the
ohmic and non-ohmic electrical transport in the
spin-density wave state of the organic conductor
(TMTSF)2NO3. In particular, we report (1) the angular
dependence of the magnetoresistance at different
temperatures and in low electric fields and (2) magnetic
field dependence of the threshold electric field for the
non-ohmic conductivity. We discuss obtained results and
compare them with the behaviour found in the spin-density
wave state of the other (TMTSF)2X compounds.
Keywords: organic conductors, spin density wave, magnetoresistivity, non-ohmic conductivity
- Type of paper
: Paper in journal
Title: Anomalous magnetoresistance in the spin-density wave state
of tetramethyltetraselenfulvalinium (TMTSF)2NO3: imperfect nesting
effects
- Authors:
- Basletić, Mario (197593)
- Biškup, Neven (179286)
- Korin-Hamzić, Bojana (61314)
- Tomić, Silvia (65594)
- Hamzić, Amir (15234)
- Bechgaard, Klaus
- Fabre, J.M
Journal: Europhysics Letters
Number: 4
ISSN: 0295-5075
Volume: 22
Year: 1993
Pages: from 279 to 285
Number of references: 22
Language: engleski
Summary: We report a study of the transverse-magnetoresistance
anisotropy in the spin-density wave phase of the organic
conductor (TMTSF)2NO3 at temperatures down to 1.8 K and
in fields up to 6 T. The transverse magnetoresistance is
highly anisotropic and obeys a temperature- and
angular-dependent power law behaviour. The indication of
a possible field-induced SDW phase is discussed. We
suggest that the SDW with large imperfect nesting
together with a periodic anion potential might be
responsible for the observed magnetic-field effects.
Keywords: low dimensional conductors, spin-density waves, magnetoresistance, imperfect nesting
- Type of paper
: Paper in journal
Title:
- Authors:
- Švaić, Srećko (48663)
- Ivezić, Željko (184324)
- Basletić, Mario (197593)
Journal: Strojarstvo
ISSN: 0562-1887
Volume: 34
Year: 1992
Pages: from 21 to 24
Number of references: 4
Language: hrvatski
Summary: Temperature field in an infinite cylider due to unsteady
coolingin the medium with constant temperature has been estimated by
ananalytic method. The solution is shown in the form of infiniteseries of
Bessel functions and diagrams for nondimensionalvariables suitable for
practical application. Results ofmodelling have been compared with the
measured values and thevalidity of the model has also been discussed.
Keywords: Bessel functions, infinite cylinder, temperature field, unsteady cooling
- Type of paper
: Paper in journal
Title: Magnetic-field dependence of the phase coherence lenght in
the spin density wave state of tetramethyltetraselenfulvalinium nitrate,
(TMTSF)2NO3
- Authors:
- Biškup, Neven (179286)
- Basletić, Mario (197593)
- Tomić, Silvia (65594)
- Korin-Hamzić, Bojana (61314)
- Maki, Kazumi
- Bechgaard, Klaus
- Fabre, J.M
Journal: Physical Review B
Number: 13
ISSN: 0163-1829
Volume: 47
Year: 1993
Pages: from 8289 to 8292
Number of references: 19
Language: engleski
Summary: We have used electric-dependent measurements to probe
themagnetic-field dependence of the phase-coherence lenght in
thespin-density-wave (SDW) state of the organic conductor(TMTSF)2NO3. The
threshold electric field increases if a magneticfield is applied in the
plane perpendicular to the highlyconducting axis. The magnitude of the
increase is angle-dependentand vanishes when the field is applied along
theintermediate-conductivity axis. This behavior results from areduction of
the phase-coherence lenght of the SDW with stronglyimperfect nesting in a
magnetic field.
Keywords: organic conductor, spin density wave, threshold electric field, magnetoresistance
- Type of paper
: Paper in proceedings
Title: Magnetic field influence on the spin-density wave of the
organic conductor (TMTSF)2NO3
- Authors:
- Tomić, Silvia (65594)
- Biškup, Neven (179286)
- Korin-Hamzić, Bojana (61314)
- Basletić, Mario (197593)
- Hamzić, Amir (15234)
- Maki, Kazumi
- Fabre, J.M
- Bechgaard, Klaus
- Editors
- Brazovskii, S
- Monceau, P
Proceedings title: Journal de Physique IV
Language: engleski
Place: Paris, Francuska
Year: 1993
ISBN/ISSN: 2-86883-197-4
Pages: from 293 to 298
Meeting: International Workshop on Electronic Crystals, ECRYS-93
Held: from 06/02/93 to 06/04/93
Summary: We present the influence of a transverse magnetic field on
the spin-density wave (SDW) ground state of the organic
conductor (TMTSF)2NO3. Magnetic field increases the
single-particle activation energy. A finite magnetic field
(Hc) induces dicontinuities in the magnetoresistance
behaviour and its value is temperature dependent. The
threshold electric field (ET) for the SDW sliding
increases in a magnetic field. All observed effects are
strongly angle-dependent indicating that they are
determined by the magnetic field component along the
least-conduction (c*) direction. We discuss these results
in the framework of a theoretical model for the SDW with
large imperfect nesting.
Keywords: organic conductors, spin density waves, threshold electrical field
- Type of paper
: Paper in proceedings
Title: Magnetotransport effects in spin-density wave state of the
organic conductor (TMTSF)2NO3
- Authors:
- Basletić, Mario (197593)
- Hamzić, Amir (15234)
- Biškup, Neven (179286)
- Tomić, Silvia (65594)
- Korin-Hamzić, Bojana (61314)
- Maki, Kazumi
- Fabre, J.M
- Bechgaard, Klaus
- Editors
- Brazovskii, S
- Monceau, P
Proceedings title: Journal de Physique IV
Language: engleski
Place: Paris, Francuska
Year: 1993
ISBN/ISSN: 2-86883-197-4
Pages: from 315 to 318
Meeting: International Workshop on Electronic Crystals, ECRYS-93
Held: from 06/02/93 to 06/04/93
Summary: We report a study of the transverse magnetoresistance
properties in the spin-density wave (SDW) phase of the
organic conductor (TMTSF)2NO3 at temperature down to 1.8K
and in magnetic field up to 6 tesla. The transverse
magnetoresistance shows large effect and is highly
anisotropic. We analize our data in the framework of
recent theoretical calculations by K.Maki.We suggest that
the SDW with large imperfect nesting together with a
periodic anion potential might be responsible for the
magnetic field effects.
Keywords: organic conductors, spin density waves, anisotropy, magnetoresistivity,
