Ferromagnetic and antiferromagnetic copper(ii) complexes: Counterplay between zero-field effects of the quartet ground state and intermolecular interactions

2011 ◽  
Vol 40 (31) ◽  
pp. 7946 ◽  
Author(s):  
Z. Boulsourani ◽  
V. Tangoulis ◽  
C. P. Raptopoulou ◽  
V. Psycharis ◽  
C. Dendrinou-Samara
Keyword(s):  
Intermolecular Interactions ◽  
Ground State ◽  
Zero Field ◽  
Field Effects

scholarly journals Ground state and stability of the fractional plateau phase in metallic Shastry–Sutherland system TmB4

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Matúš Orendáč ◽  
Slavomír Gabáni ◽  
Pavol Farkašovský ◽  
Emil Gažo ◽  
Jozef Kačmarčík ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Phase Diagram ◽  
Ground State ◽  
Constant Magnetic Field ◽  
Paramagnetic Phase ◽  
The Other ◽  
Zero Field ◽  
Plateau Phase ◽  
Low Field ◽  
Zero Field Cooling

AbstractWe present a study of the ground state and stability of the fractional plateau phase (FPP) with M/Msat = 1/8 in the metallic Shastry–Sutherland system TmB4. Magnetization (M) measurements show that the FPP states are thermodynamically stable when the sample is cooled in constant magnetic field from the paramagnetic phase to the ordered one at 2 K. On the other hand, after zero-field cooling and subsequent magnetization these states appear to be of dynamic origin. In this case the FPP states are closely associated with the half plateau phase (HPP, M/Msat = ½), mediate the HPP to the low-field antiferromagnetic (AF) phase and depend on the thermodynamic history. Thus, in the same place of the phase diagram both, the stable and the metastable (dynamic) fractional plateau (FP) states, can be observed, depending on the way they are reached. In case of metastable FP states thermodynamic paths are identified that lead to very flat fractional plateaus in the FPP. Moreover, with a further decrease of magnetic field also the low-field AF phase becomes influenced and exhibits a plateau of the order of 1/1000 Msat.

Zero field splitting of the Mo3+ ground state in corundum

1981 ◽  
Vol 107 (2) ◽  
pp. K129-K132
Author(s):  
M. Baran ◽  
A. A. Mirzakhanyan ◽  
E. G. Sharoyan ◽  
H. Szymczak
Keyword(s):  
Ground State ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting

Zero-Field Splitting of the Ground State S Ion in Calcite Type Borates

1979 ◽  
pp. 295-295
Author(s):  
A. Chlystov ◽  
S. Lukin ◽  
V. Rudenko ◽  
V. Seleznev ◽  
G. Tsintsadze
Keyword(s):  
Ground State ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting

ChemInform Abstract: THE GROUND STATE AND ZERO-FIELD SPLITTING OF THE GADOLINIUM OXIDE (GDO) MOLECULE

1982 ◽  
Vol 13 (7) ◽  
Author(s):  
R. J. VAN ZEE ◽  
R. F. FERRANTE ◽  
K. J. ZERINGUE ◽  
W. JUN. WELTNER
Keyword(s):  
Ground State ◽  
Gadolinium Oxide ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting

The ground state and zero‐field splitting of the GdO molecule

1981 ◽  
Vol 75 (11) ◽  
pp. 5297-5299 ◽  
Author(s):  
R. J. Van Zee ◽  
R. F. Ferrante ◽  
K. J. Zeringue ◽  
W. Weltner
Keyword(s):  
Ground State ◽  
Zero Field ◽  
Zero Field Splitting ◽  
Field Splitting

scholarly journals Vortex phase diagram and the normal state of cuprates with charge and spin orders

2020 ◽  
Vol 6 (7) ◽  
pp. eaay8946 ◽  
Author(s):  
Zhenzhong Shi ◽  
P. G. Baity ◽  
T. Sasagawa ◽  
Dragana Popović
Keyword(s):  
Phase Diagram ◽  
Normal State ◽  
Ground State ◽  
High Field ◽  
High Temperature Superconductors ◽  
Upper Critical Field ◽  
Energy Scale ◽  
Zero Field ◽  
Vortex Matter ◽  
Nonlinear Transport

The phase diagram of underdoped cuprates in a magnetic field (H) is key to understanding the anomalous normal state of these high-temperature superconductors. However, the upper critical field (Hc2), the extent of superconducting (SC) phase with vortices, and the role of charge orders at high H remain controversial. Here we study stripe-ordered La-214, i.e., cuprates in which charge orders are most pronounced and zero-field SC transition temperatures Tc0 are lowest. This enables us to explore the vortex phases in a previously inaccessible energy scale window. By combining linear and nonlinear transport techniques sensitive to vortex matter, we determine the T − H phase diagram, directly detect Hc2, and reveal novel properties of the high-field ground state. Our results demonstrate that quantum fluctuations and disorder play a key role as T → 0, while the high-field ground state is likely a metal, not an insulator, due to the presence of stripes.

Half-Integer Spin Molecular Nanomagnets

2002 ◽  
Vol 746 ◽  
Author(s):  
David N. Hendrickson ◽  
George Christou ◽  
Wolfgang Wernsdorfer ◽  
Stephen O. Hill ◽  
Núria Aliaga-Alcade ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Exchange Interaction ◽  
Single Molecule ◽  
Ground State ◽  
Exchange Interactions ◽  
Transverse Component ◽  
Zero Field ◽  
Magnetic Exchange ◽  
Integer Spin ◽  
Half Integer

ABSTRACTSingle-molecule magnets (SMM) are molecules that function as single-domain nanomagnets. SMMs have been characterized with a ground-state spin ranging from S = 4 to S = 13. A few SMMs have been identified that have half-integer spin ground states. [Cation][Mn12O12(O2CR)16(H2O)4] complexes, where R is some substituent, are SMMs that have either a S = 19/2 or 21/2 ground state. Quantum tunneling of magnetization (QTM) is observed for these half-integer-spin Kramers [Mn12]- degenerate SMMs in zero external magnetic field, as well as for a class of S = 9/2 Mn4 SMMs. The presence of QTM in zero external field is attributed to a transverse component of a nuclear spin field, dipolar interactions and intermolecular exchange interactions. The Landau-Zener method is used to measure the tunnel splitting as a function of transverse magnetic field for a single crystal of the S = 9/2 SMM [Mn4O3(OSiMe3)(OAc)3(dbm)3]. Spin parity dependent QTM is established. The effect of a magnetic exchange interaction between two S = 9/2 Mn4 SMMs upon QTM was studied for another compound. The hydrogen bonding and Cl…Cl contacts within a supramolecularly linked [Mn4]2 dimer lead to a weak antiferromagnetic exchange interaction between the two S = 9/2 SMMs. This interaction causes a shift (exchange bias) from zero field for the magnetic field at which QTM occurs.

scholarly journals Ideal charge-density-wave order in the high-field state of superconducting YBCO

2016 ◽  
Vol 113 (51) ◽  
pp. 14645-14650 ◽  
Author(s):  
H. Jang ◽  
W.-S. Lee ◽  
H. Nojiri ◽  
S. Matsuzawa ◽  
H. Yasumura ◽  
...  
Keyword(s):  
Charge Density ◽  
Critical Field ◽  
Ground State ◽  
Charge Density Wave ◽  
High Field ◽  
Cuprate Superconductors ◽  
Density Wave ◽  
Quantum Oscillation ◽  
Zero Field ◽  
Correlation Volume

The existence of charge-density-wave (CDW) correlations in cuprate superconductors has now been established. However, the nature of the CDW ground state has remained uncertain because disorder and the presence of superconductivity typically limit the CDW correlation lengths to only a dozen unit cells or less. Here we explore the field-induced 3D CDW correlations in extremely pure detwinned crystals of YBa2Cu3O2(YBCO) ortho-II and ortho-VIII at magnetic fields in excess of the resistive upper critical field (Hc2) where superconductivity is heavily suppressed. We observe that the 3D CDW is unidirectional and possesses a long in-plane correlation length as well as significant correlations between neighboring CuO2planes. It is significant that we observe only a single sharply defined transition at a critical field proportional toHc2, given that the field range used in this investigation overlaps with other high-field experiments including quantum oscillation measurements. The correlation volume is at least two to three orders of magnitude larger than that of the zero-field CDW. This is by far the largest CDW correlation volume observed in any cuprate crystal and so is presumably representative of the high-field ground state of an “ideal” disorder-free cuprate.

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