Richard Gaal

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Publications associées (51)

Synthesis, electrical resistivity, thermo-electric power and magnetization of cubic ZnMnO3

László Forró, Andrzej Sienkiewicz, Richard Gaal, Arnaud Magrez, Zlatko Mickovic, Jacim Jacimovic, Rita Smajda, George Cristian Vaju

Cubic ZnMnO3 powder in the form of well-crystalline nanoflakes have been synthesized at low temperatures from a nitrate precursor. The electrical properties of cubic ZuMnO(3) samples have been established by DC resistivity (rho) and thermo-electric power ( ...

Elsevier2011

High-pressure study of anatase TiO2

Helmuth Berger, László Forró, Richard Gaal, Arnaud Magrez, Jacim Jacimovic, George Cristian Vaju

We report resistivity and thermo-electric power measurements of the anatase phase of TiO2 under pressure up to 2.3 GPa. Despite its transparent appearance, the single crystal of anatase exhibits a metallic-like resistivity above 60 K, at all pressures. The ...

2010

Resistive switching in beta-SrV6O15

László Forró, Richard Gaal, Ana Akrap

EDP Sciences, Springer2008

Microwave frequency modulation in continuous-wave far-infrared ESR utilizing a quasi-optical reflection bridge

László Forró, Richard Gaal, Bálint Náfrádi

We report the development of the frequency-modulation (FM) method for measuring electron spin resonance (ESR) absorption in the 210- to 420 GHz frequency range. We demonstrate that using a high-frequency ESR spectrometer without resonating microwave compon ...

Academic Press Inc - Elsevier Science2008

Continuous-wave far-infrared ESR spectrometer for high-pressure measurements

László Forró, Andrzej Sienkiewicz, Richard Gaal, Bálint Náfrádi

We present a newly-developed microwave probe for performing sensitive high-field/multi-frequency electron spin resonance (ESR) measurements under high hydrostatic pressures. The system consists of a BeCu-made pressure-resistant vessel, which accommodates t ...

Academic Press Inc - Elsevier Science2008

Matthiessen's rule in MgB2: Resistivity and T-c as a function of point defect concentration

László Forró, Richard Gaal, Neven Barisic, Balazs Sipos, Janusz Andrzej Karpinski

We present the results of a systematic study of the temperature-dependent resistivity and of T-c of a single crystal MgB2 sample as a function of point defect concentration. We have found linear, albeit weak, correlation between the decreasing superconduct ...

2007

Pressure-induced tuning of phase transition and role of disorder in electrical transport properties of beta-Sr_xV_6O_15

László Forró, Richard Gaal, Neven Barisic, Ana Akrap

2007

High-pressure infrared spectroscopy: Tuning of the low-energy excitations in correlated electron systems

Helmuth Berger, László Forró, Richard Gaal, Balazs Sipos

We have extended the range of the high-pressure optical spectroscopy to the far-infrared region keeping the accuracy of ambient-pressure experiments. The developed method offers a powerful tool for the study of pressure-induced phase transitions and electr ...

2007

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Richard Gaal

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Synthesis, electrical resistivity, thermo-electric power and magnetization of cubic ZnMnO3

High-pressure study of anatase TiO2

Resistive switching in beta-SrV6O15

Microwave frequency modulation in continuous-wave far-infrared ESR utilizing a quasi-optical reflection bridge

Continuous-wave far-infrared ESR spectrometer for high-pressure measurements

Matthiessen's rule in MgB2: Resistivity and T-c as a function of point defect concentration

Pressure-induced tuning of phase transition and role of disorder in electrical transport properties of beta-Sr_xV_6O_15

High-pressure infrared spectroscopy: Tuning of the low-energy excitations in correlated electron systems

Effect of electron and ultraviolet irradiation on aligned carbon nanotube fibers

Effect of ultraviolet light irradiation on macroscopic single-walled carbon nanotube bundles

Separation of Orbital Contributions to the Optical Conductivity of BaVS3