First-order spin-paramagnetic transition and tricritical point in ultrathin Be films

被引：36

作者：

Adams, PW ^{[1
]}

Herron, P

Meletis, EI

机构：

[1] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[2] Louisiana State Univ, Dept Mech Engn, Mat Sci & Engn Program, Baton Rouge, LA 70803 USA

来源：

PHYSICAL REVIEW B | 1998年 / 58卷 / 06期

关键词：

D O I：

10.1103/PhysRevB.58.R2952

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report measurements of the parallel critical magnetic field of thin superconducting beryllium films with T(c)similar to 0.6 K. The critical field transitions were spin-paramagnetically limited and found to be strongly hysteretic below a tricritical point at T-tri= 190 mK. The magnitude of the hysteresis and T-tri were observed to be completely suppressed in field misalignments theta greater than or equal to 1 degrees. Time relaxation measurements in the hysteretic regime showed simple exponential decays in the highest quality films and nonexponential decays interspersed with avalanches in more inhomogeneous samples.

引用

页码：R2952 / R2955

页数：4

共 26 条

[21] DESTRUCTION OF SUPERCONDUCTIVITY IN QUENCH-CONDENSED TWO-DIMENSIONAL FILMS [J].

WHITE, AE ;

DYNES, RC ;

GARNO, JP .

PHYSICAL REVIEW B, 1986, 33 (05) :3549-3552

[22] AVALANCHES AND SLOW RELAXATION - DYNAMICS OF ULTRATHIN GRANULAR SUPERCONDUCTING FILMS IN A PARALLEL MAGNETIC-FIELD [J].

WU, WH ;

ADAMS, PW .

PHYSICAL REVIEW LETTERS, 1995, 74 (04) :610-613

[23] SPIN-PARAMAGNETIC TRANSITION OF ULTRATHIN GRANULAR AL FILMS IN A TILTED MAGNETIC-FIELD [J].

WU, WH ;

GOODRICH, RG ;

ADAMS, PW .

PHYSICAL REVIEW B, 1995, 51 (02) :1378-1380

[24] SUPERCONDUCTOR-INSULATOR TRANSITION IN A PARALLEL MAGNETIC-FIELD [J].

WU, WH ;

ADAMS, PW .

PHYSICAL REVIEW LETTERS, 1994, 73 (10) :1412-1415

[25] GRANULARITY AND SUPERCONDUCTOR-INSULATOR TRANSITION IN ELECTROCHEMICALLY ANODIZED AL FILMS [J].

WU, WH ;

ADAMS, PW ;

MCCARLEY, RL ;

DUNAWAY, DJ .

APPLIED PHYSICS LETTERS, 1994, 65 (09) :1180-1182

[26] ELECTRIC-FIELD TUNING OF THE SUPERCONDUCTOR-INSULATOR TRANSITION IN GRANULAR AL FILMS [J].

WU, WH ;

ADAMS, PW .

PHYSICAL REVIEW B, 1994, 50 (17) :13065-13068

← 1 2 3 →