Ising-Type Magnetic Anisotropy Derived by Γ7(1)Crystal Electric Field Ground State in Tetragonal CeRu2Al2B:11B and27Al NMR Studies

Matsuno, Haruki; Nohara, Hiroki; Kotegawa, Hisashi; Matsuoka, Eiichi; Tomiyama, Yo; Sugawara, Hitoshi; Harima, Hisatomo; Tou, Hideki

doi:10.1143/jpsj.81.073705

Cited by 11 publications

(9 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The actual x value of the single-crystalline sample was estimated to be x = 0.37 by comparing its cell volume with x dependence of the cell volume of polycrystalline samples. The magnetization M was measured using superconducting quantum interference device magnetometer (Quantum Design, MPMS) in the temperature T range of 1.8 and 300 K and magnetic field B range of 0 and 5 T. The electrical resistivity  was measured by a dc four-probe method in the T range of 0.4 and 294 K in a homemade 3 He cryostat. The temperature dependences of the electrical resistivities  of Ce 1-x La x Ru 2 Al 2 B are shown in Fig.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…From the result of 11 B NMR measurement, it was suggested that the magnetism of this compound is strongly anisotropic, having an Ising-like nature with the c-axis being the easy axis [2]. 11 B and 27 Al NMR measurements have revealed that the ground state of 4f electrons split by a tetragonal crystalline electric field (CEF) is the doublet  7 (1) [3]. The NMR measurements also revealed that the magnetic structure of FM-ordered state whose magnetic structure is basically an Ising-like structure along the c-axis has fractional AFM components in the c-plane [3].…”

Section: Introductionmentioning

confidence: 99%

“…11 B and 27 Al NMR measurements have revealed that the ground state of 4f electrons split by a tetragonal crystalline electric field (CEF) is the doublet  7 (1) [3]. The NMR measurements also revealed that the magnetic structure of FM-ordered state whose magnetic structure is basically an Ising-like structure along the c-axis has fractional AFM components in the c-plane [3]. Considering a temperature vs magnetic-field phase diagram constructed from the magnetization measurements using a single-crystalline sample, it was supposed that the magnetic structure of the FM state is not a simple FM structure but a canted FM one [4].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

La-Substitution Effects on the Magnetic Properties of Tetragonal Ferromagnet CeRu₂Al₂B

Nakamura¹,

Tomiyama²,

Matsuoka

et al. 2014

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013)

Self Cite

View full text Add to dashboard Cite

Polycrystalline and single crystalline samples of La-substituted compounds of CeRu 2 Al 2 B were grown and their magnetization and electrical resistivity were measured to examine the origins of high transition temperatures and a complex magnetic structure. A ferromagnetic-(FM) and an antiferromagnetic-transition temperatures decrease linearly with increasing La concentration, which implies that the high transition temperatures are not ascribable to a quadrupolar interaction but a characteristic band structure. A competition of some kinds of magnetic interactions may be responsible for the appearance of a complex magnetic structure.

show abstract

Section: Experimental Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

La-Substitution Effects on the Magnetic Properties of Tetragonal Ferromagnet CeRu₂Al₂B

Nakamura¹,

Tomiyama²,

Matsuoka

et al. 2014

Proceedings of the International Conference on Strongly Correlated Electron Systems (SCES2013)

Self Cite

View full text Add to dashboard Cite

show abstract

“…7 doublet ground state (1.8 -1.85 µ B ) with the crystal field parameters evaluated from the 11 B and 27 Al NMR study [31]. As a possible reason of the moment reduction, the authors of Ref.…”

mentioning

confidence: 99%

“…Since the 4f electrons are localized and the magnetic Ising anisotropy large compared to the transition temperatures [31], a minimal theoretical model consists of Ising spins coupled predominantly by RKKY interactions. The RKKY exchange J(r) provides a source of frustration.…”

mentioning

confidence: 99%

Incommensurate spin-density-wave antiferromagnetism inCeRu2Al2B

et al. 2016

View full text Add to dashboard Cite

The newly discovered Ising-type ferromagnet CeRu2Al2B exhibits an additional phase transition at TN = 14.2 K before entering the ferromagnetic ground state at TC = 12.8 K. We clarify the nature of this transition through high resolution neutron diffraction measurements. The data reveal the presence of a longitudinal incommensurate spin-density wave (SDW) in the temperature range of TC < T < TN. The propagation vector q ∼ (0, 0, 0.148) is nearly temperature independent in this region and discontinuously locks into q = 0 at TC. Mean-field calculations of an effective Ising model indicate that the modulated SDW phase is stabilized by a strong competition between ferromagnetic and antiferromagnetic exchange interactions. This makes CeRu2Al2B a particularly attractive model system to study the global phase diagram of ferromagnetic heavy-fermion metals under influence of magnetic frustration.PACS numbers: 71.20. Be, 75.10.Lp, 75.40.Cx Heavy Fermion intermetallic compounds display a rich variety of emergent physical properties, including quantum criticality (QC), unconventional superconductivity, Kondo insulating and non-Fermi liquid states resulting from a competition between Ruderman-Kittel-KasuyaYosida (RKKY) exchange interaction and Kondo effect [1][2][3]. If the RKKY interaction prevails, the system orders magnetically. Contrary, if the Kondo screening dominates, theory suggests a non-magnetic ground state where hybridization between the localized f electrons and the conduction carriers opens a gap at the Fermi energy [4][5][6][7][8][9]. Magnetic frustration has been recently signified as an additional dimension in the global phase diagram of heavy-Fermion metals, that can tune the degree of local-moment quantum fluctuations [10][11][12][13][14][15].Ce-based intermetallics represent an important class of heavy-fermion systems, providing a playground to study quantum criticality and the competition between RKKY and Kondo interactions. Most of them exhibit antiferromagnetic (AFM) ordering with only few examples of a ferromagnetic (FM) ground state. On the other hand, tuning of the FM transition close to the quantum critical point is of particular interest after discovery of unconventional superconductivity in some U-based compounds such as A series of FM compounds with Ising-type anisotropy has been recently reported in the tetragonal quaternary system CeRu 2 X 2 M (X=Al, Ga and M=B, C) [20][21][22][23][24]. The transition temperature to the FM state, T C , varies from 17.2 K for CeRu 2 Ga 2 C down to 12.8 K for CeRu 2 Al 2 B [23]. In addition, the latter composition exhibits another transition at T N ∼ 14.2 K > T C whose nature has not been clarified so far. Based on magnetization and specific heat measurements, it is commonly believed that the transition at T N is magnetic but no magnetic structure determination in the temperature range of T C < T < T N has been reported [20]. Macroscopic measurements in an applied magnetic field revealed a rich (T -H) phase diagram with several stable phases. Interpretation of...

show abstract

First-principle study of the electronic structure and magnetic properties of CeRu2Al2B

Hua

Tang

2012

Solid State Communications

View full text Add to dashboard Cite

Ising-Type Magnetic Anisotropy Derived by Γ₇⁽¹⁾Crystal Electric Field Ground State in Tetragonal CeRu₂Al₂B:¹¹B and²⁷Al NMR Studies

Cited by 11 publications

References 11 publications

La-Substitution Effects on the Magnetic Properties of Tetragonal Ferromagnet CeRu₂Al₂B

La-Substitution Effects on the Magnetic Properties of Tetragonal Ferromagnet CeRu₂Al₂B

Incommensurate spin-density-wave antiferromagnetism inCeRu2Al2B

First-principle study of the electronic structure and magnetic properties of CeRu2Al2B

Contact Info

Product

Resources

About

Ising-Type Magnetic Anisotropy Derived by Γ7(1)Crystal Electric Field Ground State in Tetragonal CeRu2Al2B:11B and27Al NMR Studies

Cited by 11 publications

References 11 publications

La-Substitution Effects on the Magnetic Properties of Tetragonal Ferromagnet CeRu2Al2B

La-Substitution Effects on the Magnetic Properties of Tetragonal Ferromagnet CeRu2Al2B

Incommensurate spin-density-wave antiferromagnetism inCeRu2Al2B

First-principle study of the electronic structure and magnetic properties of CeRu2Al2B

Contact Info

Product

Resources

About

Ising-Type Magnetic Anisotropy Derived by Γ₇⁽¹⁾Crystal Electric Field Ground State in Tetragonal CeRu₂Al₂B:¹¹B and²⁷Al NMR Studies

La-Substitution Effects on the Magnetic Properties of Tetragonal Ferromagnet CeRu₂Al₂B

La-Substitution Effects on the Magnetic Properties of Tetragonal Ferromagnet CeRu₂Al₂B