Anisotropy of Lower Critical Field in Organic Layered Superconductor λ-(BETS)2GaCl4

The lower critical field of type-II organic layered superconductor l-(BETS)2GaCl4 has been estimated by magnetic measurements. The demagnetization factor of a needle-like sample shape has been taken into account for the measurements by applying the external field, parallel and perpendicular to the conducting plane. The lower critical field for the field parallel to the conducting plane is 5.5(2) G, in contrast with the previous studies. This allows us to discuss the anisotropy of lower critical field Hc1 in a quasi-two-dimensional organic layered superconductor l-(BETS)2GaCl4.

Download Full-text

Lower Critical Field of Layered Organic Superconductor with Asymmetrical Donor κ-(MDT-TTF)2AuI2

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.855.221 ◽

2020 ◽

Vol 855 ◽

pp. 221-226

Author(s):

Dita Puspita Sari ◽

Naito Rui ◽

Kaito Miki ◽

Isao Watanabe ◽

Hiromi Taniguchi ◽

...

Keyword(s):

Critical Field ◽

Vortex State ◽

Magnetization Measurement ◽

Organic Superconductor ◽

Layered Superconductor ◽

Type Ii ◽

Superconducting Transition ◽

Conducting Plane ◽

Lower Critical Field ◽

Demagnetization Factor

We report magnetization measurement in the superconducting state of a type-II organic layered superconductor with asymmetrical donor k-(MDT-TTF)2AuI2. The demagnetization factor of a plate-like shape of the single crystal has been taken into account for the measurement by applying an external field perpendicular to the conducting plane. The superconducting transition temperature TC is determined to be 4.7 K through the detection of demagnetization signal. The lower critical field is 10.5±1.4 G. This result implies that the stable vortex state of k-(MDT-TTF)2AuI2 can be reached at the applied magnetic field above 105 Oe

Download Full-text

Magnetic Study of the Lower Critical Field of Organic Superconductor λ-(BETS)2GaCl4

Materials Science Forum ◽

10.4028/www.scientific.net/msf.966.296 ◽

2019 ◽

Vol 966 ◽

pp. 296-301 ◽

Cited By ~ 1

Author(s):

Dita Puspita Sari ◽

Koichi Hiraki ◽

Takehito Nakano ◽

Masayuki Hagiwara ◽

Yasuo Nozue ◽

...

Keyword(s):

External Field ◽

Critical Field ◽

Muon Spin ◽

Organic Superconductor ◽

Muon Spin Rotation ◽

Layered Superconductor ◽

Conducting Plane ◽

Lower Critical Field ◽

Depth Measurement ◽

Sample Shape

The lower critical field of type-II organic layered superconductor λ-(BETS)2GaCl4 has been estimated by magnetic measurement. In this study, the demagnetization factor of a needle-like sample shape has been taken into account for the measurements by applying external field, parallel and perpendicular to the conducting plane. The lower critical field for the field perpendicular to the conducting plane is 8(1) G, convincing the previous study. This estimation allows us to predict the ideal external field that should be applied for London penetration depth measurement by using muon-spin rotation (SR) spectroscopy.

Download Full-text