Microwave absorption in carbon-doped YNi4B superconductors

Microwave power absorption as a function of temperature and magnetic field in the ferroelectromagnet

“…The Curie temperature ðT min ¼ 398:1 KÞ obtained by the technique MAMMAS is in a good agreement with the reported values [35,36]. The appearance of an inverted peak in the MMPA is opposite to that observed in other materials [7][8][9][10][11][12]19,23,25]; this is a signature of the absorption dynamics of paramagnetic dipoles around a ferro-paraelectric phase transition.…”

“…This behavior for PFN and MnO contrasts strongly with that shown by high-T c superconductors [7,[12][13][14][15][16][17][18], ferrimagnetic [20,38] and ferromagnetic [21][22][23]39] materials.…”

“…Recently, we have implemented two experiments to measure the modulated microwave power absorption (MMPA) as a function of temperature or DC applied magnetic field [7], which have been denominated in superconductivity studies as magnetically modulated microwave absorption spectroscopy (MAMMAS) [8][9][10][11][12] and low-field microwave absorption spectroscopy (LFMAS) [12][13][14][15][16][17][18], respectively. These techniques have recently been used to detect the magnetic transition in materials [7,[19][20][21][22][23] and provide high sensitive detection of magnetic order.…”

Superconducting Properties of Mo2Re3Bx-Mo3Re2BxEutectic

“…In the eutectic regions composed of two superconducting phases Mo 2 Re 3 B x and Mo 3 Re 2 B x separated by semiconducting layer of boron, there exists a Josephson junction network. Besides numerous phenomena originating from tunnelling of the Cooper pairs, the Josephson junctions characterize strong absorption of energy in microwave band [14][15][16][17]. Therefore, the Mo 2 Re 3 B x -Mo 3 Re 2 B x eutectic exhibits very large MMMA which is comparable in magnitude to the one observed in granular high-temperature superconductors.…”

Detection of Magnetic Transitions by Means of Ferromagnetic Resonance and Microwave Absorption Techniques

“…The non-resonant microwave absorption (NRMA) was used in 1987 to detect the transition between the normal state and superconducting state in high-Tc superconductor ceramics (Bhat et al, 1987;Blazey et al, 1987;Bohandy et al, 1987;Khachaturyan et al, 1987;Moorjani et al, 1987). This was followed by a large number of reports on not only high-Tc superconductor ceramics (Kim et al, 1993;Topacli, 1996Topacli, , 1998Velter-Stefanescu et al, 1998Padam et al, 1999Padam et al, , 2010Shaltiel et al, 2001;Alvarez & Zamorano, 2004), but also including organic superconductors (Zakhidov et al 1991;Bele et al, 1994;Hirotake et al, 1997;Niebling et al, 1998;Stankowski et al, 2004), the conventional superconductors of type-I and type-II (Kheifets et al, 1990;Bhide et al, 2001;Owens et al, 2001;Andrzejewski et al, 2004) and the newly discovered iron pniticide (Panarina et al, 2010;Pascher et al, 2010). Researches on NRMA have shown that this phenomenon is highly sensitive to detection of a superconducting phase in a material under study.…”