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Journal Articles

Precision manipulation of the neutron polarisation vector

Leli$`e$vre-Berna, E.*; Brown, P. J.*; Tasset, F.*; Kakurai, Kazuhisa; Takeda, Masayasu; Regnault, L.-P.*

Physica B; Condensed Matter, 397(1), p.120 - 124, 2007/07

 Times Cited Count:22 Percentile:67.42(Physics, Condensed Matter)

no abstracts in English

Journal Articles

CRYOPAD on the triple-axis spectrometer TAS-1 at JAERI

Takeda, Masayasu; Nakamura, Mitsutaka; Kakurai, Kazuhisa; Leli$`e$vre-Berna, E.*; Tasset, F.*; Regnault, L.-P.*

Physica B; Condensed Matter, 356(1-4), p.136 - 140, 2005/02

 Times Cited Count:16 Percentile:56.75(Physics, Condensed Matter)

It is now well known that CRYOPAD (CRYOgenic Polarization Analysis Device) is a powerful device which enables us to investigate the spherical changes of neutron-spin polarization in the scattering processes of magnetic materials. ILL and CEA-Grenoble, in the framework of EC/ENPI, and JAERI, in the framework of the MoU between ILL and ASRC JAERI, initiated to assemble three third generation CRYOPADs at ILL (CRYOPADUM project), optimized both for elastic and inelastic neutron scattering. One is installed on the ILL instrument D3 (Millennium Project) and the other on the CEA-Grenoble instrument IN22. The JAERI CRYOPADUM is installed on the triple-axis spectrometer TAS-1 at JRR-3 and is now in commissioning with powerful data acquisition software implanted from D3. We present the status of the CRYOPADUM on TAS-1 at JAERI and describe some of the planned experiments.

Oral presentation

Renewed polarized neutron options on the triple-axis spectrometer TAS-1 at JAEA

Takeda, Masayasu; Nakamura, Mitsutaka; Kakurai, Kazuhisa; Leli$`e$vre-Berna, E.*; Tasset, F.*; Regnault, L.-P.*

no journal, , 

no abstracts in English

Oral presentation

Advances in polarized neutron scattering experiments on TAS-1 at JRR-3

Takeda, Masayasu; Nakamura, Mitsutaka; Shimojo, Yutaka; Kakurai, Kazuhisa; Leli$`e$vre-Berna, E.*; Tasset, F.*; Regnault, L. P.*

no journal, , 

The status of the polarized neutron options on TAS-1 is reported. TAS-1 is a thermal neutron triple-axis spectrometer installed at JRR-3 of JAEA and has been operational since 1991. Following the recent advances in the polarization analysis technique an upgrading program of polarized neutron options for TAS-1 was started five years ago. In this program new doubly-focusing-polarizing Heusler monochromator and analyzer were introduced to TAS-1. In addition, one of three third-generation CRYOPAD(CRYOgenic Polarization Analysis Device)s which were assembled for ILL(D3), CEA-Grenoble(IN22) and JAEA was installed on TAS-1 to enable the spherical polarization analysis. Using the increased polarized neutron flux elastic and inelastic polarized neutron scattering experiments with the conventional setup for the one-dimensional polarization analysis and with CRYOPAD for the three-dimensional polarization analysis are now routinely performed on TAS-1.

Oral presentation

3-D polarization analysis investigation on frustrated spin and multiferroic systems

Kakurai, Kazuhisa; Takeda, Masayasu; Matsuda, Masaaki; Wakimoto, Shuichi; Kajimoto, Ryoichi; Leli$`e$vre-Berna, E.*; Tasset, F.*; Nakamura, Mitsutaka; Osawa, Akira*

no journal, , 

Recent 3-dimensional polarization investigations using CRYOPAD at JRR-3, JAEA, will be reviewed. Results on CdCr$$_{2}$$O$$_{4}$$, a frustrated spin system with pyrochlor structure, and YMnO$$_{3}$$, a multiferroic system with spin chirality, are presented and the importance of this advanced polarization analysis method is discussed.

Oral presentation

3 Dimensional polarization analysis experiments using CRYOPAD

Kakurai, Kazuhisa; Takeda, Masayasu; Nakamura, Mitsutaka; Osawa, Akira*; Matsuda, Masaaki; Wakimoto, Shuichi; Shimojo, Yutaka; Leli$`e$vre-Berna, E.*; Tasset, F.*

no journal, , 

JAEA, in collaboration with ILL and CENG, has been installing the 3-dimensional polarization analysis equipment, CRYOPAD, on TAS-1. We report some recent results of the investigations on non-collinear magnetic ground states in the multiferroic system ErMn$$_{2}$$O$$_{5}$$ and the itinerant antiferromagnetic system CrB$$_{2}$$. Comparison and complementarity to the conventional longitudinal polarization analysis are discussed.

Oral presentation

Polarized neutron scattering investigation of non-collinear magnetic ground state

Kakurai, Kazuhisa; Takeda, Masayasu; Nakamura, Mitsutaka; Osawa, Akira*; Matsuda, Masaaki; Wakimoto, Shuichi; Shimojo, Yutaka; Leli$`e$vre-Berna, E.*; Tasset, F.*; Regnault, L. P.*

no journal, , 

Recent active investigations of spin-frustrated and multiferroic systems suggest that the appearance of non-collinear magnetic ground states is strongly correlated with their interesting novel physical properties. The detailed information on spin moment direction or its temperature dependence of complicated non-collinear magnetic structure, can be very effectively obtained by means of polarized neutron technique. JAEA, in collaboration with ILL and CENG, has been installing the 3-dimensional polarization analysis equipment, CRYOPAD, on TAS-1 at JRR-3. We report some recent results on non-collinear magnetic ground states in the multiferroic system ErMn$$_{2}$$O$$_{5}$$ and the itinerant antiferromagnetic system CrB$$_{2}$$.

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