Abstract
We report a pronounced peak effect in the magnetization of Cox NbSe2 single crystals with critical temperatures Tc ranging between 7.1 and 5.0 K, and Mnx NbSe2 single crystals with critical temperatures down to 3.4 K. We correlate the peak effect in magnetization with the structure of the vortex lattice across the peak-effect region using scanning-tunneling microscopy. Magnetization measurements show that the amplitude of the peak effect in the case of Cox NbSe2 exhibits a nonmonotonic behavior as a function of the Co content, reaching a maximum for concentration of Co of about 0.4 at.% (corresponding to a Tc of 5.7 K) and after that gradually decreasing in amplitude with the increase in the Co content. The normalized value of the peak position Hp/Hc2 has weak dependence on Co concentration. In the case of Mnx NbSe2 the features of the peak effect as a function of the Mn content are different and they can be understood in terms of strong pinning.
| Original language | English |
|---|---|
| Article number | 174518 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 78 |
| Issue number | 17 |
| DOIs | |
| Publication status | Published - Nov 17 2008 |
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ASJC Scopus subject areas
- Condensed Matter Physics
- Electronic, Optical and Magnetic Materials
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Effect of magnetic impurities on the vortex lattice properties in NbSe 2 single crystals. / Iavarone, M.; Di Capua, R.; Karapetrov, G.; Koshelev, A. E.; Rosenmann, D.; Claus, H.; Malliakas, C. D.; Kanatzidis, Mercouri G; Nishizaki, T.; Kobayashi, N.
In: Physical Review B - Condensed Matter and Materials Physics, Vol. 78, No. 17, 174518, 17.11.2008.Research output: Contribution to journal › Article
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TY - JOUR
T1 - Effect of magnetic impurities on the vortex lattice properties in NbSe 2 single crystals
AU - Iavarone, M.
AU - Di Capua, R.
AU - Karapetrov, G.
AU - Koshelev, A. E.
AU - Rosenmann, D.
AU - Claus, H.
AU - Malliakas, C. D.
AU - Kanatzidis, Mercouri G
AU - Nishizaki, T.
AU - Kobayashi, N.
PY - 2008/11/17
Y1 - 2008/11/17
N2 - We report a pronounced peak effect in the magnetization of Cox NbSe2 single crystals with critical temperatures Tc ranging between 7.1 and 5.0 K, and Mnx NbSe2 single crystals with critical temperatures down to 3.4 K. We correlate the peak effect in magnetization with the structure of the vortex lattice across the peak-effect region using scanning-tunneling microscopy. Magnetization measurements show that the amplitude of the peak effect in the case of Cox NbSe2 exhibits a nonmonotonic behavior as a function of the Co content, reaching a maximum for concentration of Co of about 0.4 at.% (corresponding to a Tc of 5.7 K) and after that gradually decreasing in amplitude with the increase in the Co content. The normalized value of the peak position Hp/Hc2 has weak dependence on Co concentration. In the case of Mnx NbSe2 the features of the peak effect as a function of the Mn content are different and they can be understood in terms of strong pinning.
AB - We report a pronounced peak effect in the magnetization of Cox NbSe2 single crystals with critical temperatures Tc ranging between 7.1 and 5.0 K, and Mnx NbSe2 single crystals with critical temperatures down to 3.4 K. We correlate the peak effect in magnetization with the structure of the vortex lattice across the peak-effect region using scanning-tunneling microscopy. Magnetization measurements show that the amplitude of the peak effect in the case of Cox NbSe2 exhibits a nonmonotonic behavior as a function of the Co content, reaching a maximum for concentration of Co of about 0.4 at.% (corresponding to a Tc of 5.7 K) and after that gradually decreasing in amplitude with the increase in the Co content. The normalized value of the peak position Hp/Hc2 has weak dependence on Co concentration. In the case of Mnx NbSe2 the features of the peak effect as a function of the Mn content are different and they can be understood in terms of strong pinning.
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U2 - 10.1103/PhysRevB.78.174518
DO - 10.1103/PhysRevB.78.174518
M3 - Article
VL - 78
JO - Physical Review B-Condensed Matter
JF - Physical Review B-Condensed Matter
SN - 1098-0121
IS - 17
M1 - 174518
ER -