Magnetic measurements (Pt. II)

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1 Magnetic measurements (Pt. II) Ruslan Prozorov October 2018 Physics 590B

2 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 2

3 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 3

4 The Josephson effect October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 4

5 Who was the first to observe JE? What is Brian Josephson doing now? University of Cambridge, UK Cavendish Laboratory Theory Condensed Matter Group Director of the Mind-Matter Unification Project October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 5

6 Josephson junction October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 6

7 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 7

8 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 8

9 Superconducting QUantum Interference Device (SQUID) flux-voltage convertors DC SQUID AC (RF) SQUID October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 9

10 A DC SQUID October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 10

11 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 11

12 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 12

13 DC SQUID October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 13

14 DC SQUID circuitry October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 14

15 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 15

16 rf-squid one junction October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 16

17 Zimerman rf SQUID October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 17

18 rf-squid October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 18

19 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 19

20 rf-squid October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 20

21 rf (10-20 MHz) current source rf-amp flux transformer resonant tank circuit October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 21

22 gradiometers October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 22

23 Zimmerman rf SQUID October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 23

24 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 24

25 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 25

26 combinations October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 26

27 Biomedical application October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 27

28 practical implementation: low-tc SQUID October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 28

29 actual devices October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 29

30 theoretical high-tc SQUID October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 30

31 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 31

32 Quantum Design MPMS not a QD SQUID October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 32

33 MPMS longitudinal and transverse coil sets October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 33

34 MPMS: longitudinal coil set October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 34

35 transverse coil set October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 35

36 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 36

37 transverse component October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 37

38 gradiometer measurements October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 38

39 how does MPMS measure magnetic moment? October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 39

40 regression October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 40

41 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 41

42 basic principles October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 42

43 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 43

44 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 44

45 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 45

46 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 46

47 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 47

48 measuring large moments October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 48

49 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 49

50 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 50

51 background subtraction October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 51

52 Practical MPMS - background October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 52

53 background is displaced from the signal by 1 mm October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 53

54 magnetic field variation October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 54

55 Remanent (remnant) field October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 55

56 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 56

57 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 57

58 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 58

59 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 59

60 October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 60

61 field non-uniformity and superconductors October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 61

62 another example & literature will be available for download October 2018 Basics of Magnetic Measurements. Part II. Prof. Ruslan Prozorov 62

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