Publications


COLD ELECTRONICS

ELECTRONICS & WIRELESS WORLD 95 (1989) 232-266

JF GREGG, ID MORRIS


FURTHER-STUDIES OF THE ENHANCED NUCLEAR MAGNET TMPO4

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 424 (1989) 245-254

B BLEANEY, JF GREGG, CHA HUAN, ID MORRIS, MR WELLS


FURTHER-STUDIES OF THE ENHANCED NUCLEAR MAGNET HOVO4 .3. THE NON-RESONANT MAGNETOACOUSTIC ABSORPTION

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 416 (1988) 83-91

B BLEANEY, JF GREGG, CHA HUAN, ID MORRIS, MR WELLS


THE MAGNETIC-PROPERTIES OF HOLMIUM TRIFLUORIDE, HOF3

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS 21 (1988) 2721-2734

B BLEANEY, JF GREGG, RW HILL, M LAZZOUNI, MJM LEASK, MR WELLS


ULTRASONIC MAGNETIC-RESONANCE OF ENHANCED NUCLEI USING THIN-FILM TECHNOLOGY

JOURNAL DE PHYSIQUE 49 (1988) 2029-2030

JF GREGG, ID MORRIS, MR WELLS


FURTHER-STUDIES OF THE ENHANCED NUCLEAR MAGNET HOVO4 .4. THE RESONANT MAGNETOACOUSTIC ABSORPTION

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 416 (1988) 93-101

B BLEANEY, GAD BRIGGS, JF GREGG, CHA HUAN, ID MORRIS, MR WELLS


20DB NOISE REDUCER

ELECTRONICS & WIRELESS WORLD 94 (1988) 1073-1074

JF GREGG


FURTHER-STUDIES OF THE ENHANCED NUCLEAR MAGNET HOVO4 .1. THE CRYSTAL-FIELD AND THE ZEEMAN SPECTRUM

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 416 (1988) 63-73

B BLEANEY, JF GREGG, P HANSEN, CHA HUAN, M LAZZOUNI, MJM LEASK, ID MORRIS, MR WELLS


MAGNETOACOUSTIC INTERFEROMETRY OF METASTABLE STATES IN DY3AL5O12

JOURNAL DE PHYSIQUE 49 (1988) 2027-2028

JF GREGG, ID MORRIS, MR WELLS, WP WOLF


MAGNETIC AND THERMAL-PROPERTIES OF HOF3-ORDERING IN A SINGLET GROUND-STATE

JOURNAL DE PHYSIQUE 49 (1988) 845-846

B BLEANEY, JF GREGG, RW HILL, M LAZZOUNI, MJM LEASK, MR WELLS


FURTHER-STUDIES OF THE ENHANCED NUCLEAR MAGNET HOVO4 .2. EXPERIMENTS WITH ACOUSTIC-WAVES

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 416 (1988) 75-81

B BLEANEY, GAD BRIGGS, JF GREGG, CHA HUAN, ID MORRIS, MR WELLS


ENHANCED NUCLEAR-ORDER IN HOVO4 REVISITED .2. ZEEMAN EFFECTS IN THE NUCLEAR-QUADRUPOLE RESONANCE OF V-51

JOURNAL OF PHYSICS C-SOLID STATE PHYSICS 20 (1987) 3175-3186

B BLEANEY, RG CLARK, JF GREGG, Y ROINEL, NJ STONE


ENHANCED NUCLEAR ACOUSTIC-RESONANCE - SOME THEORETICAL CONSIDERATIONS

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 413 (1987) 313-327

B BLEANEY, JF GREGG


High-sensitivity ultrasonic interferometer for the detection of magnetic phase transitions

Journal of Applied Physics 61 (1987) 3193-3195

CHA Huan, JF Gregg, MR Wells, GAD Briggs, WP Wolf

An improved technique is described for the detection of magnetic phase transitions using acoustic waves with electrical interferometry. The method employs zinc oxide transducers sputtered directly onto the sample. These transducers operate efficiently at frequencies up to 3 GHz, corresponding to acoustic wavelengths of the order of 2 μm. By measuring the phase of high-order multiple echoes, changes in sample thickness and/or velocity of parts in 109 can be detected. The method has been used to determine the phase diagram of the metamagnet dysprosium aluminum garnet for magnetic fields parallel to [001]. General agreement with earlier determinations based on thermodynamic measurements is obtained.


Cryogenic GaAs MESFET magnetic resonance spectrometer for use from 500 MHz to 3 GHz

Journal of Physics E: Scientific Instruments 20 (1987) 1223-1227

JF Gregg, ID Morris, MR Wells

A magnetic resonance spectrometer is described which operates between 500 MHz and 3 GHz and uses an NE72089 GaAs MESFET operating at liquid helium temperatures as the high frequency active device. Although the sensitivity is not remarkable, it compares favourably with such other techniques as are available in this frequency range and it combines small size with ease of use.


ENHANCED NUCLEAR ACOUSTIC RESONANCE IN HoVO4.

(1984) 273-274

B Bleaney, GAD Briggs, JF Gregg, GH Swallow, JMR Weaver

We report the first experiments at GHz frequencies on 'enhanced nuclear acoustic resonance'. Enhanced nuclear resonance of 165Ho has been observed using longitudinal acoustic waves propagated along the (100) axis of a single crystal of HoVO4, at frequencies of 0. 7 to 1. 6 GHz.


OPTICAL AND MAGNETIC STUDIES OF TMASO4

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 394 (1984) 69-85

B BLEANEY, JF GREGG, MJM LEASK, MR WELLS


ENHANCED NUCLEAR ACOUSTIC-RESONANCE IN HOVO4

PROCEEDINGS OF THE ROYAL SOCIETY OF LONDON SERIES A-MATHEMATICAL PHYSICAL AND ENGINEERING SCIENCES 388 (1983) 479-486

B BLEANEY, GAD BRIGGS, JF GREGG, GH SWALLOW, JMR WEAVER


NUCLEAR ELECTRIC QUADRUPOLE INTERACTION IN LNVO4

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 31-4 (1983) 745-746

B BLEANEY, JF GREGG, AC DEOLIVEIRA, MR WELLS


ENHANCED NMR OF TM-169 IN TMASO4

JOURNAL OF MAGNETISM AND MAGNETIC MATERIALS 31-4 (1983) 1061-1062

B BLEANEY, JF GREGG, MJM LEASK, MR WELLS

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