Naidyuk, Yu. G., Behr, G., Bobrov, N. L., Chernobay, V. N., Fuchs, G., ...
An general survey of the superconducting (SC) gap study in the title compounds by point-contact (PC) spectroscopy is presented. The SC gap was determined from dV/dI of PCs employing the well-known...
Bobrov, N. L., Chernobay, V. N., Naidyuk, Yu. G., Tyutrina, L. V., Naugle, D. G., Rathnayaka, K. D. D., ...
Point contacts (PC) Andreev reflection dV/dI spectra for the antiferromagnetic (T_N =6K) superconductor (Tc=11K) ErNi2B2C have been measured for the two main crystallographic directions. Observed...
Naidyuk, Yu. G., Kvitnitskaya, O. E., Yanson, I. K., Fuchs, G., Nenkov, K., Waelte, A., ...
Point-contact (PC) spectroscopy measurements on antiferromagnetic (AF) (T_N=5.2K) HoNi2B2C single crystals in the normal and two different superconducting (SC) states (T_c=8.5K and $T_c^*=5.6K) are...
Spin Diode Based on Fe/MgO Double Tunnel Junction (2007)
Iovan, A., Andersson, S., Naidyuk, Yu. G., Vedyaev, A., Dieny, B., Korenivski, V.
We demonstrate a spin diode consisting of a semiconductor free nano-scale Fe/MgO-based double tunnel junction. The device exhibits a near perfect spin-valve effect combined with a strong diode...
Surface Spin-valve Effect (2007)
Yanson, I. K., Naidyuk, Yu. G., Fisun, V. V., Konovalenko, A., Balkashin, O. P., Triputen, L. Yu., ...
We report an observation of spin-valve like hysteresis within a few atomic layers at a ferromagnetic interface. We use phonon spectroscopy of nanometer sized point contacts as an in-situ probe to...
Bashlakov, D. L., Naidyuk, Yu. G., Yanson, I. K., Behr, G., Fuchs, G., ...
Point-contact (PC) spectroscopy measurements of YNi2B2C single crystals in the normal and superconducting (SC) state (T_c=15.4K) for the main crystallographic directions are reported. The PC study...
Point-contact spectroscopy of the borocarbide superconductor YNi2B2C (2006)
Naidyuk, Yu. G., Bashlakov, D. L., Yanson, I. K., Fuchs, G., Behr, G., Souptel, D., ...
Point-contact (PC) spectroscopy measurements on YNi2B2C single crystals in the normal and superconducting (SC) state (T_c=15.4K) for the main crystallographic directions are reported. The PC study...
Point-contact spectroscopy of the antiferromagnetic superconductor HoNi2B2C (2006)
Naidyuk, Yu. G., Kvitnitskaya, O. E., Yanson, I. K., Fuchs, G., Nenkov, K., Walte, A., ...
The point-contact (PC) spectroscopy study of the electron-phonon(boson) interaction (EP(B)I) spectral function in HoNi2B2C reveals phonon maxima at 16 and 22meV and 34meV. For the first time the...
Naidyuk, Yu. G., Bashlakov, D. L., Bobrov, N. L., Chernobay, V. N., Kvitnitskaya, O. E., Yanson, I. K., ...
An overview of the recent efforts in point-contact (PC) spectroscopy of the nickel borocarbide superconductors RNi2B2C in the normal and superconducting (SC) state is given. The results of...
Naidyuk, Yu. G., Yanson, I. K., Bashlakov, D. L., Fisun, V. V., Balkashin, O. P., Triputen, L. Y., ...
In nanocontacts between normal and ferromagnetic metals (N--F) abrupt changes of the order of 1% are detected in differential resistance, dV/dI(V), versus bias voltage, V, on achieving of high...
Spectroscopy of phonons and spin torques in magnetic point contacts (2005)
Yanson, I. K., Naidyuk, Yu. G., Bashlakov, D. L., Fisun, V. V., Balkashin, O. P., Korenivski, V., ...
Phonon spectroscopy is used to investigate the mechanism of current-induced spin torques in nonmagnetic/ferromagnetic (N/F) point contacts. Magnetization excitations observed in the...
Point-contact spectroscopy of the normal state excitations in PrOs4Sb12 (2005)
Kvitnitskaya, O. E., Naidyuk, Yu. G., Yanson, I. K., Karkin, A., Naumov, S., Kostromitina, N.
Point-contact (PC) investigations of the heavy-fermion (HF) superconductor PrOs4Sb12 in the temperature range between 1.5 and 4.2K and in a magnetic field up to 8T are presented. The main feature in...
Bashlakov, D. L., Naidyuk, Yu. G., Yanson, I. K., Wimbush, S. C., Holzapfel, B., Fuchs, G., ...
The differential resistances $R_d=dV/dI(V)$ of point contacts between a normal metal and a c axis oriented YNi2B2C film ($T_c$ = 15.2K) in the superconducting (SC) state have been investigated....
Naidyuk, Yu. G., Gloos, K., Yanson, I. K.
We have observed at low temperatures (
Naidyuk, Yu. G., Kvitnitskaya, O. E., Yanson, I. K., Fuchs, G., Nenkov, K., ...
An overview on recent efforts in point-contact (PC) spectroscopy of title superconductors is given. Distinct phonon features and crystalline-electric-field effects are observed in PC spectra of...
Naidyuk, Yu. G., Gloos, K., Yanson, I. K., Sato, N. K.
We have investigated metallic break junctions of the heavy-fermion compound UPd2Al3 at low temperatures between 0.1K and 9K and in magnetic fields up to 8T. Both the current-voltage I(V)...
Excess current in point contacts on two-band superconductor MgB$_2$ in magnetic field (2004)
Naidyuk, Yu. G., Kvitnitskaya, O. E., Yanson, I. K., Lee, S., Tajima, S.
Series of $I(V)$ characteristic and bias-dependent differential resistance $dV/dI(V)$ for point-contacts on the single crystals of two-band superconductor MgB$_2$ were measured in magnetic field up...
Advances in point-contact spectroscopy: two-band superconductor MgB2 (A review) (2004)
Yanson, I. K., Naidyuk, Yu. G.
Analysis of the point-contact spectroscopy (PCS) data on the new dramatic high-T$_c$ superconductor MgB$_2$ reveals quite different behavior of two disconnected $\sigma$ and $\pi$ electronic bands,...
Phonon self-energy effects in the superconducting energy gap of MgB2 point-contact spectra (2004)
Yanson, I.K., Beloborod'ko, S.I., Naidyuk, Yu G., Dolgov, O.V., Golubov, A.A.
In strong-coupling superconductors with a short electron mean free path the self-energy effects in the superconducting order parameter play a major role in the phonon manifestation of the...
In a recent paper (Phys. Rev. {\bf B 67}, 094502 (2003)) Mao et al. investigated the bias-dependent conductance of mechanical junctions between superconducting MgCNi$_3$ and a sharp W tip. They...
Point-Contact Spectroscopy (2003)
Naidyuk, Yu. G., Yanson, I. K.
The history is described of how one of the most commonly used electric circuit components, an ordinary electric contact, has become a powerful tool for the physicists to study various mechanisms of...
Self-energy Effect of Superconducting Energy Gap in Point-Contact Spectra of MgB$_2$ (2003)
Yanson, I. K., Beloborod'ko, S. I., Naidyuk, Yu. G., Dolgov, O. V., Golubov, A. A.
In strong-coupling superconductors with a short electron mean free path the self-energy effects in the superconducting order parameter play a major role in the phonon manifestation of the...
Point-contact spectroscopy of two-band superconductor MgB2 (2003)
Yanson, I. K., Naidyuk, Yu. G.
The progress in investigation of two-band superconductor MgB$_2$ by the point-contact spectroscopy (PCS) is given. Results of study of superconducting gap temperature and magnetic field dependence...
Yanson, I. K., Naidyuk, Yu. G., Kvitnitskaya, O. E., Fisun, V. V., Bobrov, N. L., Chubov, P. N., ...
We review investigations of the electron-phonon interaction (EPI) in metal diborides MeB_2 (Me=Zr, Nb, Ta, Mg) by point-contact (PC) spectroscopy. For transition metal compounds the PC EPI functions...
Search for E_2g phonon modes in MgB_2 single crystals by point-contact spectroscopy (2002)
Naidyuk, Yu. G., Yanson, I. K., Tajima, S.
The electron-phonon interaction in magnesium diboride MgB_2 single crystals is investigated by point-contact (PC) spectroscopy. For the first time the electron coupling with E_2g phonon modes is...
Naidyuk, Yu. G., Kvitnitskaya, O. E., Yanson, I. K., Behr, G., Otani, S.
The electron-phonon interaction (EPI) in transition metal diborides TB_2 (T=Zr, Nb, Ta) is investigated by point-contact (PC) spectroscopy. The PC EPI functions were recovered and the EPI parameters...
Phonon structure in I-V characteristic of MgB$_{2}$ point-contacts (2002)
Yanson, I. K., Fisun, V. V., Bobrov, N. L., Naidyuk, Yu. G., Kang, W. N., Choi, Eun-Mi, ...
The search of the phonon structure at the above-gap energies was carried out for $d^{2}V/dI^{2}(V)$ spectra of MgB$_{2}$ point contacts with a normal metal. The two-band model is assumed not only for...
Naidyuk, Yu. G., Yanson, I. K., Tyutrina, L. V., Bobrov, N. L., Chubov, P. N., Kang, W. N., ...
We have analyzed about 100 voltage-dependent differential resistance dV/dI(V) curves of metallic point contacts between c-axis oriented MgB$_2$ thin film and Ag, which exhibit clear Andreev...
Bobrov, N. L., Chubov, P. N., Naidyuk, Yu. G., Tyutrina, L. V., Yanson, I. K., Kang, W. N., ...
The superconducting order parameter and electron-phonon interaction (EPI) in a MgB$_{2}$ c-axis oriented thin film are investigated by point contacts (PCs). Two superconducting gaps...
Superconducting gap and pair breaking in CeRu2 studied by point contacts (2001)
Moskalenko, A. V., Naidyuk, Yu. G., Yanson, I. K., Hedo, M., Inada, Y., Onuki, Y., ...
The superconducting gap in a CeRu$_{2}$ single crystal is investigated by point contacts. BCS-like behavior of the gap $\Delta $ in the temperature range below T$_{c}^{*}
Is CeNiSn the Kondo semiconductor?: break-junction data (2001)
Naidyuk, Yu. G., Gloos, K., Takabatake, T.
IVC characteristics as well as their derivatives were recorded for contacts on the base of CeNiSn, known as Kondo semiconductor, in the metallic and the tunnelling regime at temperatures between...
Magnetic state in URu2Si2, UPd2Al3 and UNi2Al3 probed by point contacts (2001)
Naidyuk, Yu. G., Kvitnitskaya, O. E., Jansen, A. G. M., Geibel, C., Menovsky, A. A., Wyder, P.
The antiferromagnetic (AFM) state has been investigated in the three heavy-fermion compounds URu2Si2, UPd2Al3, and UNi2Al3 by measuring dV/dI(V) curves of point contacts at different temperatures...