Calorimetry of bcc SolidHe3through the Nuclear Magnetic Ordering Temperature in a Magnetic Field

1986 ◽  
Vol 56 (15) ◽  
pp. 1587-1590 ◽  
Author(s):  
A. Sawada ◽  
H. Yano ◽  
M. Kato ◽  
K. Iwahashi ◽  
Y. Masuda
Keyword(s):  
Magnetic Field ◽  
Magnetic Ordering ◽  
Magnetic Ordering Temperature ◽  
Nuclear Magnetic

Investigation of field-controlled magnetocaloric switching and magnetodielectric phenomena in spin-chain compound Er2BaNiO5

2021 ◽  
Author(s):  
Arnab Pal ◽  
Zhenjie Feng ◽  
Hao Wu ◽  
Ke Wang ◽  
Jingying Si ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Spin Chain ◽  
Magnetic Ordering ◽  
Magnetic Interactions ◽  
Future Research ◽  
Antiferromagnetic Ordering ◽  
Magnetocaloric Properties ◽  
Magnetic Ordering Temperature ◽  
Magnetodielectric Effect ◽  
Chain Compound

Abstract The Haldane spin-chain compound Er2BaNiO5 has been known to possess magnetoelectric coupling below the magnetic ordering temperature. Here we report various low-temperature magnetic and magnetocaloric properties, and magnetodielectric effect above magnetic ordering temperature in this compound. The present compound displays a coexistence of conventional and inverse magnetocaloric effects with a large entropy change of 5.9 and −2.5 J/kg K, respectively. Further, it exhibits a remarkable switching between them, which can be tuned with temperature and magnetic field. In addition, evolution of two magnetic field-dependent metamagnetic transitions at 19.7 and 27.7 kOe, and their correlation with magnetocaloric switching effect, make this compound effective for potential applications. On the other hand, demonstration of intrinsic magnetodielectric effect (1.9%) near and above antiferromagnetic ordering temperature, through a moderate coupling between electric dipoles and magnetic spins, establishes this compound as a useful candidate for future research. A detailed analysis of these findings, in a framework of different magnetic interactions and magnetocrystalline anisotropies, is discussed here. Overall, these results may provide a future pathway to tune the magnetic, magnetodielectric, and magnetocaloric properties in this compound toward better application potential.

Calorimetric studies of body-centered cubic solid 3He

1987 ◽  
Vol 65 (11) ◽  
pp. 1346-1350 ◽  
Author(s):  
Y. Masuda ◽  
K. Iwahashi ◽  
H. Yano ◽  
M. Kato ◽  
A. Sawada
Keyword(s):  
Phase Diagram ◽  
Magnetic Phase ◽  
Magnetic Phase Diagram ◽  
Magnetic Ordering ◽  
Body Centered Cubic ◽  
Magnetic Specific Heat ◽  
Magnetic Ordering Temperature ◽  
Calorimetric Studies ◽  
Solid 3He ◽  
Nuclear Magnetic

The nuclear magnetic specific heat of body-centered cubic solid 3He in applied magnetic fields has been measured as a function of temperature through a temperature range including the nuclear magnetic ordering temperature. The magnetic phase diagram has been determined. The nuclear magnetic properties are also discussed.

Nuclear magnetic resonance microscopy

1989 ◽  
Vol 47 ◽  
pp. 828-829
Author(s):  
Paul C. Lauterbur
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Magnetic Resonance ◽  
Magnetic Fields ◽  
Signal To Noise ◽  
Field Gradients ◽  
Useful Signal ◽  
Magnetic Field Gradients ◽  
Observation Times ◽  
Nuclear Magnetic

Nuclear magnetic resonance imaging can reach microscopic resolution, as was noted many years ago, but the first serious attempt to explore the limits of the possibilities was made by Hedges. Resolution is ultimately limited under most circumstances by the signal-to-noise ratio, which is greater for small radio receiver coils, high magnetic fields and long observation times. The strongest signals in biological applications are obtained from water protons; for the usual magnetic fields used in NMR experiments (2-14 tesla), receiver coils of one to several millimeters in diameter, and observation times of a number of minutes, the volume resolution will be limited to a few hundred or thousand cubic micrometers. The proportions of voxels may be freely chosen within wide limits by varying the details of the imaging procedure. For isotropic resolution, therefore, objects of the order of (10μm) may be distinguished.Because the spatial coordinates are encoded by magnetic field gradients, the NMR resonance frequency differences, which determine the potential spatial resolution, may be made very large. As noted above, however, the corresponding volumes may become too small to give useful signal-to-noise ratios. In the presence of magnetic field gradients there will also be a loss of signal strength and resolution because molecular diffusion causes the coherence of the NMR signal to decay more rapidly than it otherwise would. This phenomenon is especially important in microscopic imaging.

NUCLEAR MAGNETIC ORDERING

1978 ◽  
Vol 39 (C6) ◽  
pp. C6-1436-C6-1443 ◽  
Author(s):  
A. Abragam ◽  
V. Bouffard ◽  
M. Goldman ◽  
Y. Roinel
Keyword(s):  
Magnetic Ordering ◽  
Nuclear Magnetic

THEORY OF THE NUCLEAR MAGNETIC ORDERING IN Cu IN A FIELD

1988 ◽  
Vol 49 (C8) ◽  
pp. C8-2051-C8-2052 ◽  
Author(s):  
Per-Anker Lindgård
Keyword(s):  
Magnetic Ordering ◽  
Nuclear Magnetic

Pressure and temperature dependences of the canting angle and increase in the magnetic ordering temperature, Tc(P), for the weak ferromagnet Li+[TCNE]˙− (TCNE = tetracyanoethylene)

2021 ◽  
Author(s):  
Royce A. Davidson ◽  
Joel S. Miller
Keyword(s):  
Magnetic Ordering ◽  
Weak Ferromagnet ◽  
Temperature Dependences ◽  
Magnetic Ordering Temperature ◽  
Temperature And Pressure

Li[TCNE] is a weak ferromagnet whose canting angle, α, as a function of temperature and pressure, α(T) and α(P), have similar but unexpected dependencies that are attributed to a competition between the intra- and interlayer C⋯N interlattice.

Nuclear magnetic ordering in the diluted Van Vleck paramagnets Pr1−xYxNi5

1994 ◽  
Vol 194-196 ◽  
pp. 299-300
Author(s):  
T. Herrmannsdo¨rfer ◽  
H. Uniewski ◽  
F. Pobell
Keyword(s):  
Magnetic Ordering ◽  
Van Vleck ◽  
Nuclear Magnetic
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