Construction and calibration of a 12 T pulsed magnet integrated with a 4 K closed-cycle refrigerator

被引:4
作者
Murthy, O. V. S. N. [1 ]
Venkataraman, V. [1 ]
机构
[1] Indian Inst Sci, Dept Phys, Bangalore 560012, Karnataka, India
关键词
D O I
10.1063/1.2813884
中图分类号
TH7 [仪器、仪表];
学科分类号
0804 ; 080401 ; 081102 ;
摘要
A low cost 12 T pulsed magnet system has been integrated with a closed-cycle helium refrigerator for performing magnetotransport measurements. Minimal delay between pulses and ac current excitation with software lock-in to reduce noise enables quick but accurate measurements to be performed at temperatures of 4-300 K up to 12 T. An additional pulsed magnet operating with a liquid nitrogen cryostat extends the range up to 19 T. The instrument has been calibrated against a commercial superconducting magnet by comparing quantum Hall effect data in a p-channel SiGe/Si heterostructure, and common issues arising out of pulsed magnet usage have been addressed. The versatility of the system is demonstrated through magnetotransport measurements in a variety of samples such as heterostructures, narrow gap semiconductors, and those exhibiting giant magnetoresistance. (c) 2007 American Institute of Physics.
引用
收藏
页数:5
相关论文
共 11 条
[1]   Magnetic field induced band depopulation in intrinsic InSb: a revisit [J].
Bansal, B ;
Venkataraman, V .
JOURNAL OF PHYSICS-CONDENSED MATTER, 2005, 17 (43) :7053-7060
[2]  
BANSAL B, 2004, THESIS INDIAN I SCI
[3]   A WIDE-BAND AC-COUPLED CURRENT SOURCE FOR ELECTRICAL-IMPEDANCE TOMOGRAPHY [J].
BRAGOS, R ;
ROSELL, J ;
RIU, P .
PHYSIOLOGICAL MEASUREMENT, 1994, 15 :A91-A99
[4]   Pulsed magnets [J].
Herlach, F .
REPORTS ON PROGRESS IN PHYSICS, 1999, 62 (06) :859-920
[5]   Digital method of pulsed-high-field magnetoresistive measurements based on finite impulse response filters [J].
Kozlova, Nadejda ;
Kozlov, Mikhail ;
Eckert, Dieter ;
Mueller, Karl-Hartmut ;
Schultz, Ludwig .
JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS, 2004, 272 :E1679-E1680
[6]  
Lang A, 1998, ADV CRYOG ENG, V43, P1573
[7]   A DIGITAL LOCK-IN-TECHNIQUE FOR PULSED MAGNETIC-FIELD EXPERIMENTS [J].
MACHEL, G ;
VONORTENBERG, M .
PHYSICA B, 1995, 211 (1-4) :355-359
[8]  
Montgomery D.B., 1969, SOLENOID MAGNET DESI
[9]   Collapse of the charge-ordering state at high magnetic fields in the rare-earth manganite Pr0.63Ca0.37MnO3 -: art. no. 024426 [J].
Nagapriya, KS ;
Raychaudhuri, AK ;
Bansal, B ;
Venkataraman, V ;
Parashar, S ;
Rao, CNR .
PHYSICAL REVIEW B, 2005, 71 (02)
[10]  
Ott H.W., 1988, Noise reduction techniques in electronic system, VSecond