Magnons in ferromagnetic terbium under high pressure
We have performed an inelastic neutron scattering experiment in order to investigate the pressure dependence of the magnon dispersion of terbium in its ferromagnetic phase. Our measurements were performed along the crystal c axis at 90 K (well below the Curie temperature Tc=220 K) at ambient pressur...
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| Veröffentlicht in: | Journal of applied physics 1994-05, Vol.75 (10), p.6060-6062 |
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| container_title | Journal of applied physics |
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| creator | Kawano, S. Fernandez-Baca, J. A. Nicklow, R. M. |
| description | We have performed an inelastic neutron scattering experiment in order to investigate the pressure dependence of the magnon dispersion of terbium in its ferromagnetic phase. Our measurements were performed along the crystal c axis at 90 K (well below the Curie temperature Tc=220 K) at ambient pressure, and at 4.3 and 15.2 kbar of applied hydrostatic pressure. The difference between the magnon dispersion curves at ambient pressure and at 4.3 kbar is small, while at 15.2 kbar the dispersion curve shifts appreciably towards higher energies. The measured magnon dispersion curves have been analyzed using a Hamiltonian that includes Heisenberg exchange as well as single-ion anisotropy terms. For each dispersion curve we have calculated five exchange constants and two anisotropy terms. The energy gap at q=0 due to the anisotropies is enhanced with pressure and exchange interactions acting between c planes appear to decrease with the application of high pressure. |
| doi_str_mv | 10.1063/1.355457 |
| format | Article |
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The energy gap at q=0 due to the anisotropies is enhanced with pressure and exchange interactions acting between c planes appear to decrease with the application of high pressure.</description><identifier>ISSN: 0021-8979</identifier><identifier>EISSN: 1089-7550</identifier><identifier>DOI: 10.1063/1.355457</identifier><language>eng</language><publisher>United States</publisher><subject>360104 - Metals & Alloys- Physical Properties ; BEAMS ; CRYSTAL MODELS ; DISPERSION RELATIONS ; ELEMENTS ; FERROMAGNETIC MATERIALS ; HEISENBERG MODEL ; INELASTIC SCATTERING ; MAGNETIC MATERIALS ; MAGNONS ; MATERIALS ; MATERIALS SCIENCE ; MATHEMATICAL MODELS ; METALS ; NEUTRON BEAMS ; NUCLEON BEAMS ; PARTICLE BEAMS ; PRESSURE DEPENDENCE ; QUASI PARTICLES ; RARE EARTHS ; SCATTERING ; TEMPERATURE RANGE ; TEMPERATURE RANGE 0065-0273 K ; TERBIUM ; VERY HIGH PRESSURE</subject><ispartof>Journal of applied physics, 1994-05, Vol.75 (10), p.6060-6062</ispartof><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c254t-cff2dd0f3a45d5568575592b1c5825f7fd0ddb2bd58885e67e567b082803cd743</citedby><cites>FETCH-LOGICAL-c254t-cff2dd0f3a45d5568575592b1c5825f7fd0ddb2bd58885e67e567b082803cd743</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>230,314,780,784,885,27924,27925</link.rule.ids><backlink>$$Uhttps://www.osti.gov/biblio/7274399$$D View this record in Osti.gov$$Hfree_for_read</backlink></links><search><creatorcontrib>Kawano, S.</creatorcontrib><creatorcontrib>Fernandez-Baca, J. A.</creatorcontrib><creatorcontrib>Nicklow, R. M.</creatorcontrib><title>Magnons in ferromagnetic terbium under high pressure</title><title>Journal of applied physics</title><description>We have performed an inelastic neutron scattering experiment in order to investigate the pressure dependence of the magnon dispersion of terbium in its ferromagnetic phase. Our measurements were performed along the crystal c axis at 90 K (well below the Curie temperature Tc=220 K) at ambient pressure, and at 4.3 and 15.2 kbar of applied hydrostatic pressure. The difference between the magnon dispersion curves at ambient pressure and at 4.3 kbar is small, while at 15.2 kbar the dispersion curve shifts appreciably towards higher energies. The measured magnon dispersion curves have been analyzed using a Hamiltonian that includes Heisenberg exchange as well as single-ion anisotropy terms. For each dispersion curve we have calculated five exchange constants and two anisotropy terms. The energy gap at q=0 due to the anisotropies is enhanced with pressure and exchange interactions acting between c planes appear to decrease with the application of high pressure.</description><subject>360104 - Metals & Alloys- Physical Properties</subject><subject>BEAMS</subject><subject>CRYSTAL MODELS</subject><subject>DISPERSION RELATIONS</subject><subject>ELEMENTS</subject><subject>FERROMAGNETIC MATERIALS</subject><subject>HEISENBERG MODEL</subject><subject>INELASTIC SCATTERING</subject><subject>MAGNETIC MATERIALS</subject><subject>MAGNONS</subject><subject>MATERIALS</subject><subject>MATERIALS SCIENCE</subject><subject>MATHEMATICAL MODELS</subject><subject>METALS</subject><subject>NEUTRON BEAMS</subject><subject>NUCLEON BEAMS</subject><subject>PARTICLE BEAMS</subject><subject>PRESSURE DEPENDENCE</subject><subject>QUASI PARTICLES</subject><subject>RARE EARTHS</subject><subject>SCATTERING</subject><subject>TEMPERATURE RANGE</subject><subject>TEMPERATURE RANGE 0065-0273 K</subject><subject>TERBIUM</subject><subject>VERY HIGH PRESSURE</subject><issn>0021-8979</issn><issn>1089-7550</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>1994</creationdate><recordtype>article</recordtype><recordid>eNotkE1LxDAURYMoWEfBn1Bcuen4kvQ1yVIGHYURN7oObT6mEZsOSbvw31upq8uFw-VyCLmlsKXQ8Ae65Yg1ijNSUJCqEohwTgoARiuphLokVzl_AVAquSpI_dYe4xhzGWLpXUrjsHQ3BVNOLnVhHso5WpfKPhz78pRcznNy1-TCt9_Z3fznhnw-P33sXqrD-_5193ioDMN6qoz3zFrwvK3RIjYSlzOKddSgZOiFt2BtxzqLUkp0jXDYiA4kk8CNFTXfkLt1d8xT0NmEyZnejDE6M2nBFkKpBbpfIZPGnJPz-pTC0KYfTUH_KdFUr0r4L-poUiI</recordid><startdate>19940515</startdate><enddate>19940515</enddate><creator>Kawano, S.</creator><creator>Fernandez-Baca, J. A.</creator><creator>Nicklow, R. M.</creator><scope>AAYXX</scope><scope>CITATION</scope><scope>OTOTI</scope></search><sort><creationdate>19940515</creationdate><title>Magnons in ferromagnetic terbium under high pressure</title><author>Kawano, S. ; Fernandez-Baca, J. A. ; Nicklow, R. M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c254t-cff2dd0f3a45d5568575592b1c5825f7fd0ddb2bd58885e67e567b082803cd743</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1994</creationdate><topic>360104 - Metals & Alloys- Physical Properties</topic><topic>BEAMS</topic><topic>CRYSTAL MODELS</topic><topic>DISPERSION RELATIONS</topic><topic>ELEMENTS</topic><topic>FERROMAGNETIC MATERIALS</topic><topic>HEISENBERG MODEL</topic><topic>INELASTIC SCATTERING</topic><topic>MAGNETIC MATERIALS</topic><topic>MAGNONS</topic><topic>MATERIALS</topic><topic>MATERIALS SCIENCE</topic><topic>MATHEMATICAL MODELS</topic><topic>METALS</topic><topic>NEUTRON BEAMS</topic><topic>NUCLEON BEAMS</topic><topic>PARTICLE BEAMS</topic><topic>PRESSURE DEPENDENCE</topic><topic>QUASI PARTICLES</topic><topic>RARE EARTHS</topic><topic>SCATTERING</topic><topic>TEMPERATURE RANGE</topic><topic>TEMPERATURE RANGE 0065-0273 K</topic><topic>TERBIUM</topic><topic>VERY HIGH PRESSURE</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Kawano, S.</creatorcontrib><creatorcontrib>Fernandez-Baca, J. A.</creatorcontrib><creatorcontrib>Nicklow, R. M.</creatorcontrib><collection>CrossRef</collection><collection>OSTI.GOV</collection><jtitle>Journal of applied physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Kawano, S.</au><au>Fernandez-Baca, J. A.</au><au>Nicklow, R. M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Magnons in ferromagnetic terbium under high pressure</atitle><jtitle>Journal of applied physics</jtitle><date>1994-05-15</date><risdate>1994</risdate><volume>75</volume><issue>10</issue><spage>6060</spage><epage>6062</epage><pages>6060-6062</pages><issn>0021-8979</issn><eissn>1089-7550</eissn><abstract>We have performed an inelastic neutron scattering experiment in order to investigate the pressure dependence of the magnon dispersion of terbium in its ferromagnetic phase. Our measurements were performed along the crystal c axis at 90 K (well below the Curie temperature Tc=220 K) at ambient pressure, and at 4.3 and 15.2 kbar of applied hydrostatic pressure. The difference between the magnon dispersion curves at ambient pressure and at 4.3 kbar is small, while at 15.2 kbar the dispersion curve shifts appreciably towards higher energies. The measured magnon dispersion curves have been analyzed using a Hamiltonian that includes Heisenberg exchange as well as single-ion anisotropy terms. For each dispersion curve we have calculated five exchange constants and two anisotropy terms. The energy gap at q=0 due to the anisotropies is enhanced with pressure and exchange interactions acting between c planes appear to decrease with the application of high pressure.</abstract><cop>United States</cop><doi>10.1063/1.355457</doi><tpages>3</tpages></addata></record> |
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| ispartof | Journal of applied physics, 1994-05, Vol.75 (10), p.6060-6062 |
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| source | AIP Digital Archive |
| subjects | 360104 - Metals & Alloys- Physical Properties BEAMS CRYSTAL MODELS DISPERSION RELATIONS ELEMENTS FERROMAGNETIC MATERIALS HEISENBERG MODEL INELASTIC SCATTERING MAGNETIC MATERIALS MAGNONS MATERIALS MATERIALS SCIENCE MATHEMATICAL MODELS METALS NEUTRON BEAMS NUCLEON BEAMS PARTICLE BEAMS PRESSURE DEPENDENCE QUASI PARTICLES RARE EARTHS SCATTERING TEMPERATURE RANGE TEMPERATURE RANGE 0065-0273 K TERBIUM VERY HIGH PRESSURE |
| title | Magnons in ferromagnetic terbium under high pressure |
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